> This demand that one justify one's actions continues to amaze me,
> particularly its selective enforcement. Why should one have to know
> the effects of one's actions beforehand? Aren't we all experimenting
> here?
When you experiment, you typically start with a hypothesis.
"Justify one's actions" = "come up with a reason for them." Yes, people should have a reason for their actions. Otherwise they're irrational.
SA