The moderately easy problem of consciousness (Noah Smith, Apr 27, 2026, Noahpinion)
You know you’re self-aware, but that’s about it — you aren’t telepathic, so you have no way of seeing into anyone else’s mind and knowing what it’s like to be them. Actually, it gets worse — you don’t even know if you were really self-aware five minutes ago. For all you know, you could have been created by a powerful computer and given a complete set of false memories.1 The past version of you is just as alien to your currently self-aware self as any of the people around you.
This is known in philosophy as the “problem of other minds”. It’s closely related to the “hard problem of consciousness” — the question of how physical processes give rise to subjective experience. The problem of other minds means that the hard problem of consciousness will never fully be solved. Since you’ll never know whether other people are really conscious, you’ll never be able to get hard scientific evidence about why they’re conscious. You can never explain something if you don’t know if it’s true or not.
Similarly, you’ll never know what it’s really like to be someone else — whether the color red looks to you like it looks to them, whether they feel pain the same way you do, and so on. In fact, you’ll never even know what it was like to be you in the past. Subjective experience is incommensurable.
Sympathy is ample.