Either we're reincarnated or we're not.

Some Florida keys

This is Emily Writes Back, the advice column for brilliant people, by Emily Sanders Hopkins. (Write to me at EmilyWritesBack@gmail.com.)

Dear Reader,

We’ve had a lovely winter break from school and work this week and are right this very second in a crowded airport waiting for our plane home. Oops, they are boarding us!

A quick summary of our trip …

I’m un…