Critical thinking and math are two different things.
In math, you just try to solve the problem. But to think critically, you have to find the problem first.

Why should we limit ourselves to computer simulations? Our world could be simulated inside of a cosmic brain.

First, you see the evil in the world.
Then, you see the evil in others.
Eventually, you see the evil within yourself.

@Captain Homicide

What if somebody is in their last moments of life. If denial makes those last moments better, then wouldn't it be good? IDK, that one's kind of an edge case.

@Vera Mont
Maybe that was a bad example. But what about more generally? Do you think that denial can be helpful? And if so, does that make denial rational under some circumstances?

Kids should be taught philosophy from age 13. From my experience, after puberty is when most kids gain the ability to think in abstract ways. Of course, at that age they may not be able to challenge what they are being taught, but that's okay. Their future selves will eventually be forced to.

Could it be that your mind is just a collection of thoughts. Some thoughts may stay, others will go, but suppose that you bump your head and forget absolutely everything. Are you still you now that you have forgotten everything?

@Tom Storm

How dare you use my own words against me.

@Tom Storm

Military spending is good, even if our schools suffer. I would rather be uneducated and free.