Philosophy: 60-Second Adventures in Thought (combined)

A look at 6 different 'Adventures in Thought' (this is a combination of all 6 parts of the series into one video)

(All parts - combined)

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[jedimaster]

I seriously wish all academic subjects could be presented in such a fun and interesting way!

[OpenLearn_OU]

For those who have expressed an interest, the animators were: Henry Paker, Victoria Kitchingman.

[OpenLearn_OU]

@bluegreenplanet89 Yes, it really is David Mitchell :)

[NavneetVasistha]

@StrikaAmaru : Another example used to explain this infinite series is that of two people separated by a distance and having to both move half of the distance between them to meet at the centre. Now if only one of the person is willing to move, each half that he/she moves will decrease the distance but would never make it zero as there can be infinitesimal halves between them.

[LemonyBello]

@ShatterSide It's more of a thought experiment than a practical assessment of the possibility of time travel.

[SpiritofSix]

Ideas are powerful things, I have always believed. Reality, due to the diverse nature in which it is perceived and experienced, is mostly an idea: reality results from a certain way of thinking and perceiving the things and events around us. Following this course of thought, if we are to change the ideas that we uphold we would also effectively shift the realities that we experience.

This is my one passion: to expand our minds and to tear down the walls of traditional thinking that have chained us. By giving the power of new ideas back to people we can excite change where it is really needed.

If you think yourself a philosopher or you want to expand your mind: bring me your thoughts and I will bring you mine. Life is no competition; may we learn from each other.

[oO_ox_O]

@Hissanrach The paradox is stating he _can't_ move beyond the tortoise because let's say at a certain point in time when he is behind the tortoise (like right after the start because of the advance he gave it) it would take him a certain amount of time to reach the point where the tortoise was at this moment and so once when he reached this point the tortoise had time to move on it's own, thus repeating this process but never coming to an end, ie. Achilles never moves beyond it.

[terribletallrus]

I love this. This is amazing. Great work. :)

[OpenLearn_OU]

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[almostnearlyevil]

The explanation for the twin paradox only covers the premise of the paradox. The paradox itself is that from the moving twin's perspective, his twin, as well as his planet, flew away from him and came back (because all motion is relative). The question this poses is why the twin in the ship is the one who ages slower. I don't fully understand the resolution, although it has something to do with acceleration.

[SirDerekJames]

@Pretsal The first one is a bit antiquated, because it was theorized back when we had very little understanding of infinity.

[oO_ox_O]

@RedDaVincy to your comment regarding 4: I don't thing that's correct. AFAIK, the concept of multiple infinities is generally only used when referring to the cardinality of sets because in the case of sequence this won't help you solve certain other and maybe more extreme "anomalies" (like where "approximating" by cutting-off at terms next to each other can yield totally different results).

[thetango]

i love his work on "would i lie to you" and "mock the week"

[Tanglephish]

@Tanglephish If you could count to infinity, you would be able to count each of these lists. However, the list of all real numbers or even all real numbers between 0 and 1 is bigger than those, because of Cantor's diagonalization argument, which I won't go into here.

[SamLuke]

@OULEARN you guys are the greatest channel on Youtube.

[Hissanrach]

@595o Yes I understand that, but what I still don't get is that if you actually applied this problem to real life Achillies would just speed past the turtle. The problem assumes that Achillies is forever moving to close the distance between him and the turtle, but for the idea to work he would have to slow down as he reaches the turtle. In reality, he would not, especially if it was a race to a predetermined point. This only makes sense if Achillies was phyiscally unable to reach the turtle.

[thisisToLife]

this was amazing! and opened my eyes to a lot of things I don't quite yet understand but would like to learn about. thank you for this!

[natro]

@huswsimonbla

Here the best way I can simplify it. As they start Achilles is at point A, and the tortoise is at point B. The time it takes for Achilles to reach B is 1. So when Achilles would have reached point B the tortoise will have moved to B+1. Now Achilles have to move from B to B+1, but the time it take to reach B+1 would allow the tortoise to move to B+1+2 (2 represent the time it takes to travel from B to B+1). As you can see this gap can continue to shrink indefinitely.

[lazypunk]

@timen1986 That's not the way you want to think of it. You have to think of it as 1 is paired with 2 and therefore 2 is paired with 4 and so on. This would make them the same level of infiniti i.e. countably infinite.

[CaptainOfDoom]

Interestingly enough, 1/2 + 1/4 + 1/8 and so on DOES end, despite there being infinitely many items in the addition! In fact, the value of that particular infinite sequence is exactly 1!