I know it because of my psychic learnings
Over in the little_details community, chibiyaoichan asks if twins can actually manifest each other's physical pain.

The consensus of the community is "no, not in real life."

This doesn't sit well with icedmaple, who is a psychic and has proof that she found on the internet which consists entirely of personal anecdotes.

Then she has a little fit on her journal. Twice.

How dare you not delete her comments in order to prove that she's irrational? That's just mean, kutsuwamushi. >:(