Re^2: At the end of the quest, I would hate to face:

[girarde]

You distinguish electrons by their position, or their state. Everybody knows that.

Bash em close enough together (high energy collision) and you don't know which one came out on which side, though.

[swampyankee]

Although there was, apparently, a (semi-serious?) theory that there was only 1 electron, which when traveling backwards in time became a positron.

I think there are a few theoretical physicists who need their medications sorted out. Conversely, most MBAs and all politicians need to get their meds sorted out.