What is Quantum Mechanics? (joke video)

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eigenchris

2 ай бұрын

What is Quantum Mechanics?

Пікірлер: 253

@eigenchris 2 ай бұрын

Hi, all. I'm glad that people have been appreciating the April Fools' videos I've made over the last few years, but moving forward, I can't promise I'm going to continue making them. I've been feeling less motivated to make them lately, and it's starting to feel less like a fun thing I enjoy doing and more like a chore that I need to uphold for the sake of tradition. I'd rather focus on making the videos I actually want to make. Sometimes that will include joke videos, but I'd rather make those naturally instead of being on a schedule.

@TheDavidlloydjones 2 ай бұрын

Nobody is forcing you to make your April Fools' Day videos at any fixed time. You can just make them when you feel like it and set them aside to post when it feels approriate. But thanks, congratulations, all that stuff...

@theodorostsilikis4025 2 ай бұрын

All the universe is made out of nested sacred polyhedra. (of different rainbow colors invisible to human eye)

@kingplunger6033 2 ай бұрын

well, for what its worth, this video was a pleasant surprise and not something I expected of you

@narfwhals7843 2 ай бұрын

Forced jokes are rarely funny. The greatest appeal of your joke videos, to me, was that I didn't expect them. So I'd say do them when you feel like it, not when you think you should.

@kabeerkumar4334 2 ай бұрын

Complete support to you. Glad you admitted this. But just a tip, to keep such traditions going, people usually create their stuff whenever they are motivated, and then keep it in store until the time comes for it to be posted. You can maybe try this. Otherwise it's completely fine. And I love your work!! (No gay)

@sreevathsan246 2 ай бұрын

April fools video from eigenchris is a classic (unlike quantum mechanics)

@meirfa 2 ай бұрын

it is certain that eigenchris uploads a video on april fools (unlike quantum mechanics)

@sreevathsan246 2 ай бұрын

@@meirfa 😆

@linuxp00 2 ай бұрын

Now, it'll be a quantum event

@vinniepeterss 2 ай бұрын

😂😂

@evanmyers580 2 ай бұрын

[Michio Kaku has entered the chat]

@dillbourne 2 ай бұрын

On one hand, he was one of the primary communicators that got me interested in Physics in the first place. I was enthralled with his more... Liberal use of technological extrapolation back when I was 10-15. On the other, he's responsible for such aggregious misinformation in favor of physics, that he has both alienated most of the serious scientific community because the public has been inoculated with extreme expectations that we cannot possibly fulfill. And they've (the public/lay person) been catching on since the mid-2010s

@evanmyers580 2 ай бұрын

@dillbourne I've heard a lot of people say that about him. I think it's fantastic to get people interested in the sciences. But I think doing it by spreading misinformation does far more harm than good. I've never been a fan of things that sound click baity, so I never really took him seriously. I tend to dislike PBS Spacetime and a lot of string theorists for the same reason 😂

@user-Aaron- 2 ай бұрын

@@dillbourneegregious* Just FYI

@user-Aaron- 2 ай бұрын

@@evanmyers580I'm not a physicist but I've always found PBS Space Time's videos to be pretty reasonable and down-to-earth. I do think they cover some of the more fringe theories in physics from time to time (probably out of public interest) but Dr. O'Dowd is always straightforward about making that known.

@dillbourne 2 ай бұрын

@@evanmyers580 I'm personally with @user-Aaron- here that PBS spacetime specifically is usually reasonable with their topics and speculation. When they start to reach too far outside the boundaries of established theory or experiment, they've at least made it clear that "established science" ends there, and they're venturing fully into fringe-theory territory. Their episodes on any alternative gravity, various speculative new particles, and white holes come to mind. Even in their string theory videos, they're quite clear that science cannot rely on anything from string theory to predict anything because the possibility space is too large. Michio had fully produced televised series and books on "The science of the future" where he'd extrapolate current tech a mere 80 years out saying we'd have flying cars, lightsabers, xray contact lenses, you name it, without much more supporting proof than "a tech startup is working on it" or it came from a well written scifi book.

@booJay 2 ай бұрын

I thought I understood QM before, but I REALLY understand it now. Thank you.

@asdf8asdf8asdf8asdf 2 ай бұрын

Every single sentence is a painful truth born of direct experience… Gold!!

@linuxp00 2 ай бұрын

Born by squaring the amplitude

@dillbourne 2 ай бұрын

"You have no idea what's going on, so of course you pass the class with an A" 1000 howlers cannot describe how much I hate that this is what happens.

@dillbourne 2 ай бұрын

The pseudoscience adventure has been neat since then tho

@linuxp00 2 ай бұрын

If you try to rationalize it, a wild Bell's paradox is throw at you

@jamesmcadory1322 2 ай бұрын

Literally I did well in my Quantum Physics classes and had no idea what was going on. The professor was really bad at teaching but thankfully made the class passable

@mapo499 2 ай бұрын

tl:dr the maths is understandable but hard to link with the physics. i mean i have only done 2 quantum mechanics modules in uni so far (still have to do the exam for one) but this maybe due to the actual maths being relatively simple to understand (at least as far as we have got which is computing the time evolution of wave equations along with some other stuff) but the linking of the maths to the physical interpretations is hard so if an exam is largely focused on using the maths with a few simple connections to the interpretations that were covered extensively in lectures then this makes sense

@homerthompson416 2 ай бұрын

As long as he tells me what momentum is in the $100 book

@janmackovcak 2 ай бұрын

It’s the wavy thingy waving around and sending good vibes in the ancient quantum mind field… that will be $100 please. For $50 more, I can tell you how they built the pyramids using ladder operators

@neutronenstern. Ай бұрын

F=dP/dt. If a Force F acts on an object with a constant mass m it accelerates with a acceleration a=F/m. So i defined momentum using nothing, but the definition of a Kg,a Second and a meter. Now give me 100$ or donate it (while citing Neutronen Stern aka. me) to "team trees".

@homerthompson416 Ай бұрын

@@neutronenstern. Still not seeing where the square root of -1 comes into the momentum operator tbh

@neutronenstern. Ай бұрын

@@homerthompson416 not important. The formula P=m*v or P=i*h/2π*d/dx or ... Is NOT needed for understanding, WHAT momentum is. The square root of -1 is just needed to be able to formulate the probability density function ψ in a "easy" and mathematically pleasing way. You could go without it, if you did it the very very hard way, with matrices, and so on. You need it, so that you can describe a qm particle with a Function. Just as you need negative sign to describe directions, holes, .... . You could go completely without negative numbers. You would just have to live with the fact, that you had to take another note to state the direction,... . Negative does not exist in reality. We made it up. √-1 does not exist in reality. We made it up. 1.5 does not exist. (it represents one+ half of something, but you can not possibly count from 0 to 0.5) We made everything in math up as a tool. A tool to describe reality. To say it more clearly: the wave function ψ can NOT be measured. Only |ψ|^2 can be measured. Thus √(-1) will never be observed. It was the tool, that made the cupboard, however it does, and it had never existed and there is no proof of it.

@neutronenstern. Ай бұрын

@@homerthompson416 not important. The formula P=m*v or P=i*h/2π*d/dx or ... Is NOT needed for understanding, WHAT momentum is. The square root of -1 is just needed to be able to formulate properties of a particle as a function ψ in a "easy" and mathematically pleasing way. You could go without it, if you did it the very very hard way, with matrices, and so on. You need it, so that you can describe a qm particle with a Function. Just as you need negative sign to describe directions, holes, .... . You could go completely without negative numbers. You would just have to live with the fact, that you had to take another note to state the direction,... . Negative does not exist in reality. We made it up. √-1 does not exist in reality. We made it up. 1.5 does not exist. (it represents one+ half of something, but you can not possibly count from 0 to 0.5) We made everything in math up as a tool. A tool to describe reality. To say it more clearly: the wave function ψ can NOT be measured. Only |ψ|^2 can be measured. Thus √(-1) will never be observed. It was the tool, that made the cupboard, however it does, and it had never existed and there is no proof of it.

@fullmetaltheorist 2 ай бұрын

From university drama to game of thrones to a techbro crypto influencer video. Best story ever.

@shApYT 2 ай бұрын

Quantum Mechanics is the lore for the Weave in D&D.

@shApYT 2 ай бұрын

Shit looks straight like Eldritch runes and is literally magic.

@alexanderfasth5035 2 ай бұрын

Honest critique: I was hoping this one resebled the momentum video, with honest confusion among students. It started great with the unintuative fact of orthogonality. I wish it continued with 3-4 more examples. Low hanging fruit would be the double slit experiment. Other ones could be Bell's theorem and fleshing out the EPR thing.

@eigenchris 2 ай бұрын

That's fair. I had the opposite feeling, where I wanted to try something new instead of repeating the same format I had done in the past. That comes with the risk of making something people don't like as much.

@alexanderfasth5035 2 ай бұрын

@@eigenchris I appreciate your creative efforts.

@gauravsaimaddipati8356 2 ай бұрын

This was damn awesome@@eigenchris

@shoda9939 2 ай бұрын

The moment this video opens and the dead inside burnt out college student working 2 jobs alongside studying for the exams voices out I clicked subscribe immediately

@theosib 2 ай бұрын

this was so good I watched it at 1x speed!

@eigenchris 2 ай бұрын

The greatest compliment a youtuber can receive.

@theosib 2 ай бұрын

@@eigenchris Probably even greater is that I'm going to show it to my kids when they're up!

@shivamchouhan5077 Ай бұрын

@@eigenchrisThis video was so good, I watched it with my eyes!

@davidreichert9392 2 ай бұрын

Sums up my 2024 so far quite nicely. Thank you.

@that_kai_person 2 ай бұрын

I'm a HS Physics major who's really passionate. I love your videos because they make me seriously laugh about it, which honestly happens less and less. We need more of this, but would also like to see serious stuff like the wacky units vid, one of my best go-to YT videos.

@narfwhals7843 2 ай бұрын

I feel like there is some sort of subtle message hidden within this video.

@digbysirchickentf2315 2 ай бұрын

Yeah, he knows it's all BS but people keep watching, kerching, This animation is a confession.

@surrealphysics 2 ай бұрын

I just love this so much for all the reasons, of course each being at right angles to one another ❤

@jankriz9199 2 ай бұрын

Man words cannot contain how happy I am that from the time you were explaining what momentum is I have undertaken 5 quantum physics/ qft courses, so I dont have to experience another trauma

@hoggif 2 ай бұрын

Magnifficient! Now I finally know what a partijcle really is. I find your videos so helpful, this as well.

@tikkar466 2 ай бұрын

Fantastic and thanks sir

@Cybernatural 2 ай бұрын

One of the best videos ever on quantum mechanics.

@hambonesmithsonian8085 2 ай бұрын

I saw that Fano Plane, you can’t hide from me

@eigenchris 2 ай бұрын

The Fano Plane is something useful that looks suspiciously like mysticism.

@3irikur 2 ай бұрын

I'm glad I took a high-school class introducing quantum mechanics. Now I don't remember much of it, but I do know that the teacher mentioned the laundry part I just realized it wasn't for me and I hopped off before getting in too deep.

@peterfreiling6963 Ай бұрын

This is a great parody on how people who never studied quantum mechanics make it out to be much more than it is, and see in it what they want to see.

@kanhaiyalalrajput3215 2 ай бұрын

Uploading videos on April fools day is a nice way of making your viewers more critically review your work. 😂😂❤

@miguelaphan58 2 ай бұрын

Fabulous !!!

@prismatic-bl8qf 2 ай бұрын

i awaited this sequel for so long, and i will keep watching these sequels every year from now

@dannybell6159 2 ай бұрын

Unlucky for you he is quitting

@prismatic-bl8qf 2 ай бұрын

@@dannybell6159 WHAT :(( i mean he is kinda old i respect that but it makes me sad

@user-Aaron- 2 ай бұрын

@@prismatic-bl8qflol He sounds no older than 30. And he's not quitting KZfaq, just probably not doing specific April Fools videos anymore. Check out the pinned comment or his community tab post.

@prismatic-bl8qf 2 ай бұрын

@@user-Aaron- RIGHT? i was shocked too. He's 32! LIKE HOW. He is probably serious.

@josephbunverzagt9535 2 ай бұрын

loved it!!

@Gigabyte019 2 ай бұрын

Alternative title: how to start a cult

@dilanlakmal6622 2 ай бұрын

Please do complete vedio series obout that topic

@KritarthaSharma Ай бұрын

i was waiting for thisss

@Zen_Cycling Ай бұрын

man, this is _so_ good.

@christophergame7977 2 ай бұрын

Spot on !!

@marsalmacola 2 ай бұрын

LEGEND IS BACK

@GeorgePapademetriou 2 ай бұрын

Perfect! I finally understood quantum mechanics!

@nekdozahadny4846 2 ай бұрын

As a physics student myself, studying quantum mechanics this year, I can confirm this is indeed how Quantum mechanics work.

@user-ql4sw4el2d 2 ай бұрын

How is Quantum Mechanics? I hope they are ok in all this chaos... My best FTL prayers to them.

@marklundeberg7006 2 ай бұрын

So relatable!

@hafplace1346 Ай бұрын

hey this sounds familiar, except there's a replacement for "me" and quantum mechanics with something else

@KorawichKavee 2 ай бұрын

0:28 you pass the class with a STATE of grade A lol

@attilauhljar3636 2 ай бұрын

Yes, finally, this made a lot more sense than Spinors for Beginners.. 🤣 Made my day, thanks!!

@mohamedtarek385 2 ай бұрын

Would you consider making a QM Course soon?

@BlubBeats 2 ай бұрын

Great

@shivang8632 Ай бұрын

That escalated quickly.

@helmetongrass1893 2 ай бұрын

Now i wanna learn quantum mechanics

@ayushsinghrana9037 2 ай бұрын

Haha what a funny video, this will never happen real world right??

@davidhand9721 2 ай бұрын

10/10, best KZfaq video.

@PortalUser2 2 ай бұрын

You have cracked the code chris!

@tulpamedia Ай бұрын

This video is absolute GOLD. Im downloading this shit lol.

@hylt27 2 ай бұрын

this was so specific

@deborahmurphy1114 2 ай бұрын

😂Omg! This was hysterically funny! I'm sharing this with family and friends. They may not get it but that's okay, I do. I used to be into a lot of new age psuedoscience until I took higher math, classes on electronics and read explanations of quantum mechanics. It's a difficult topic and I admit, I won't claim to understand all the details but I do know that it's stupid to try and use the theory of quantum mechanics to prove new age psuedoscience.

@eigenchris 2 ай бұрын

I believed some amount of pseudoscience as well when I was a teenager. I don't really blame people who have misguided beliefs, but I definitely blame any swindlers who are leading the charge.

@RBRB-hb4mu 2 ай бұрын

Dark background and light colors in the foreground for diagrams please, it’s easier to learn

@NaeNzuko 2 ай бұрын

The least realistic part of this video is that someone actually doesn't understand QM.

@martinondrus6344 Ай бұрын

Just hit the professor with "if you think you understand quantum physics, you dont" quote and he will let you pass

@StefSubZero270 19 күн бұрын

Honestly this is what happened to me, its been 2 years now since i did my QM class (it was hard af) and for most of the time i barely understood what i was doing. Now i know the formalism and can understand the math behind it and some resemblance of physical interpretation but im still far from "understanding" it

@DavidBeckwitt 2 ай бұрын

This is hilarious. Nice one

@aymenzaki6786 2 ай бұрын

Can you upload courses on quantum mechanics like general relativity it will be wonderful

@DrechWatchesYoutube 2 ай бұрын

❤

@meirfa 2 ай бұрын

Michio Kaku in a nutshell.

@Palessan69 2 ай бұрын

finally a video which made me understand quantum statistics

@Bangy Ай бұрын

This is the entirety of spirit science's channel in 1 video.

@hedgehog3180 Ай бұрын

I don't think he has a degree though.

@worschtebrot 2 ай бұрын

I, for one, welcome our new quantum overlords.

@figur3itout307 2 ай бұрын

THIS closely represents the QM class I took. I think you nailed it. And had I realized it then , today I would see the future while entangled in my space Lamborghini. In another life I suppose….

@JerryMlinarevic 2 ай бұрын

Thanks, great stuff; laughed all through the video. (It's funny because there is a lot of truth to it).

@_Nitrous_ 2 ай бұрын

Took 1 QM class... start a cult

@jizert 2 ай бұрын

what is your favorite integration technique?

@madcircle7311 Ай бұрын

3:30 Dune music intensifies

@Trwn1721 2 ай бұрын

Still the opening is relatable as I am going through qm in my undergrad now. A more of abstract mathematical beauty which really doesn't need to be physically relatable. P. Dirac way of quantum as beautiful mathematical equations is most peaceful way 😂 I think now.

@burpleson 2 ай бұрын

I'm reminded of Bob's School of Quantum Mechanics.

@CaesarIscariot 2 ай бұрын

It's the Chopra and Dawkins fight

@wassim1sameh800 2 ай бұрын

The main character in this video is the antagonist of the "Quantum Bullsh*t" book by Chris Ferrie.

@yannpoco Ай бұрын

LOL very funny video and a very hot guy on the cover

@user-Aaron- 2 ай бұрын

Idk I kinda like that Frank guy, would totally vote for him.

@Billy-sm3uu 2 ай бұрын

4:20 is perfection

@eli_0625 2 ай бұрын

2:58 this really got me

@Mezian.7s 2 ай бұрын

What's quantum mechanics ❌️ What's religion ✅️

@tombombadil6483 Ай бұрын

This actually happened to my buddy Eric

@HelloWorld-lv4we 2 ай бұрын

I need a physics expert! I am a layperson who enjoys physics, and I have a question about spinors. My understanding is that spinors are equivalent to space-time indices (indices on a 4D manifold). Do spinors ever exist on odd-dimensional manifolds? In other words, do spinors occur on even-dimensional manifolds only? I ask this because I’ve heard that bosons are “non-spinorial”, so I’m mainly curious to know whether the force fields are odd-dimensional. If I’m conceptualizing these things wrong, please tell me.

@ozzymandius666 2 ай бұрын

Try some of this quantum woo! It's the good stuff! I would sell Haga to a slayer such as you?

@HighWycombe 2 ай бұрын

Great video... any chance of a proper course on Quantum Mechanics like your series on Relativity?

@eigenchris 2 ай бұрын

I don't plan on making one. Qunatum Sense has a good 14-video playlist on QM you can check out.

@HighWycombe 2 ай бұрын

@@eigenchris Thanks for responding. Yes, I'm working through the Quantum Sense videos already. They are the best I've found, and very good... just not as good as the videos that you make. I love your style of teaching :-)

@eigenchris 2 ай бұрын

@@HighWycombe Thanks. Although I'm not sure I could do better than him. I've largely stayed away from QM on this channel (except for when QM uses spinors) because I don't understand QM very well. I've been taught the rules and equations, but I don't really get the "why" for most of it.

@HighWycombe 2 ай бұрын

@@eigenchris The nearest that we've come to a "why" in physics seems to be Emmy Noether's theorem. "Every symmetry has a corresponding conservation law and every conservation law has a corresponding symmetry." I don't suppose that would motivate you into another series would it? I bought Dwight E. Neuenschwander's book on Emmy Noether's Wonderful Theorem but I haven't managed to get very far into it.

@eigenchris 2 ай бұрын

@@HighWycombe I like Noether's theorem, but I still find QM and especially QFT pretty confusing. Honestly I don't think I'll be doing another series after the spinors series. I'll probably be sticking to one-off videos.

@SwankierAlex 2 ай бұрын

This is too realistic for an April's fool joke x)

@matheusmaica9098 2 ай бұрын

my take away is that quantum mechanics is no match for molotov cocktails

@hedgehog3180 Ай бұрын

Molotov cocktails was the true quantum mechanics all along.

@chicken_croissantpbs3162 Ай бұрын

This is so funny ahahaha

@CCequalPi 2 ай бұрын

Lets goooo

@Sabir40 Ай бұрын

I am stuck in a problem understanding Gaussian curvature for a metric. I find most of the paper in arxiv take firsr approximation in calculating Gaussian curvature for a complicated metric. Can you show me how to take those approximations?

@eigenchris Ай бұрын

I don't have any videos on that, but the best notes I've seen on differential geometry of surfaces is from this professors website: liavas.net/courses/math430/ Check the "Surfaces Part 3" PDF for learning about Gaussian curvature.

@setorious 2 ай бұрын

I mean there is a chance i will soon understand quantum mechanics and will be able to utilize all its alien and time travel power right? i'm manifesting really hard so shouldn't be long now

@SamanthaPyper-sl4ye 2 ай бұрын

Formally disproving or demonstrating the absolute inconsistency of classical logic, mathematics and physics in their entirety would be an immense undertaking requiring rigorous foundational work. However, I can outline some key conceptual arguments and avenues for how the infinitesimal monadological framework could facilitate such an endeavor: 1. Self-Referential Paradoxes in Classical Logic Classical bivalent logic faces paradoxes like the Liar's Paradox that appear to undermine the very notion of consistent truth assignments from within the system itself. The monadological framework resolves this by replacing bivalent truth values with pluriverse-valued realizability projections across multiple monadic perspectives. One could formally demonstrate how classical propositional/first-order logic succumbs to diagonalization and self-reference contradictions, while the infinitesimally-stratified realizability logic remains coherent. 2. Incompleteness of Classical Mathematical Systems Drawing on Gödel's Incompleteness Theorems, one could formally show how any classical mathematical system based on arithmetic is either inconsistent or necessarily incomplete - containing statements that are true but unprovable within the system. The monadological framework, by representing arithmetic categorically using homotopy-theoretic objects in infinitesimal algebraic set theory, could potentially restore full semantic completeness while avoiding the diagonal self-referential gimmicks that limited classical formalisms. 3. Geometric/Topological Paradoxes Classically, unconstrained definitions in point-set topology lead to contradictions like the Banach-Tarski paradox. One could formally derive these contradictions, then demonstrate how representing topology algebraically using n-categories of monadic spaces, and defining invariants like dimension infinitesimally, resolves the paradoxes coherently. 4. Renormalization Issues in Quantum Field Theory The perturbative infinities plaguing QFT that require ad-hoc renormalization procedures could be formally derived as contradictions within the classical frameworks. One could then construct infinitesimal regulator alternatives using monadological algebraic QFT representations that manifestly avoid these infinities while preserving empirical predictions. 5. Singularities in General Relativity The occurrence of spacetime singularities where classical GR breaks down could be formally deduced as an inconsistency. One could then develop singularity-free models treating spacetime geometry as emergent from monadological charge relation algebras, demonstrating the resolution of this inconsistency. 6. The Measurement Problem in Quantum Mechanics The inconsistencies in the Copenhagen interpretation regarding wavefunction collapse could be formally derived. One could then construct an explicitly consistent monadological quantum representation where observers' perspectives naturally decohere records without ad-hoc collapse postulates. The overall strategy would be to: 1) Formalize paradoxes/inconsistencies within classical theories using derivations in their native linguistic formalisms. 2) Construct infinitesimal monadological representation frameworks modeling the same phenomena using the algebraic pluralistic foundations. 3) Formally demonstrate how the monadological representations precisely resolve the inconsistencies encountered classically in a rigorous way. This would amount to a line-by-line deconstruction of the classical frameworks, systematically expunging their contradictions by reprocessing them through the prism of the coherent algebraic infinitesimal pluralisms. While an immense undertaking, the potential payoff would be a complete, formally unified refutation of classical premises by reconstructing all theories from metaphysically guaranteed non-contradictory first principles resonating with subjective realities. An infinitesimal monadological "metamathematics" could provide the symbolic weapons to finally overthrow centuries of accumulated incoherency at judgment day.

@marcorivera2019 2 ай бұрын

Why do I feel like some of the conversations in this video happened to u irl

@deekshithb9097 2 ай бұрын

2:54 since you are using narrative present, you have to use 'find' not 'found'.

@depressedguy9467 2 ай бұрын

I have been watching all these jokes since 2020

@keremcnar5014 2 ай бұрын

A classic

@DB-xf7bx 22 күн бұрын

So you made a religion out of quantum mechanics

@anishmaelhab 2 ай бұрын

remember; if she sells sea shells on the sea shore, this guy can conquer the entire multiverses by superpositioning into one another.

@D_dusze 2 ай бұрын

bro somehow got my diary

@makespace8483 2 ай бұрын

Good "1"!

@adamsmith7885 Ай бұрын

Entanglement actually does allow you to communicate faster than the speed of light (just not with aliens since there's no such thing as aliens). Suppose Bob and Alice are generals in a space military and are about to travel away from each other by 1ly. Before they depart from each other, they share half of an entangled system with each other. When both are in position, they can cooperate without communication delays by measuring a particle everytime they are about to make a strategic decision. With this process, they will know where the other is, and what strategy each is doing, without having to wait 2 years.

@eigenchris Ай бұрын

How are they going to communicate using the entangled particle? Measuring the particle on their own won't tell them anything.