:.|:;

I might have made this up as well, but I have a very distinct memory of basically suddenly becoming conscious at around being 3 years old. I woke up from a nap and for a couple hours or possibly days, I wasn’t sure whether I was dreaming or the world around me was actually real. After a couple of days of waking up in the same environment, I eventually accepted this to be reality. I of course don’t remember everything from this point on in my life, but it really felt like the first time I was able to explicitly think about stuff.

I think quite some people heard of the concept of different kinds of infinity, but don’t know much about how these are defined. That’s why this meme should be inverted, as thinking the infinities described here are the same size is the intuitive answer when you either know nothing or quite something about the definition whereas knowing just a little bit can easily lead you to the wrong answer.

As the described in the wikipedia article in the top level comment, the thing that matters is whether you can construct a mapping (or more precisely, a bijection) from one set to the other. If so, the sets/infinities are of the same “size”.