"You can do it as long as anyone reasonable can reach that conclusion"
- is not so much a rule as it is a pragmatic statement about not getting
caught violating the rule, and
I have no problem with that.
- is heavily subject to the heckler's veto; someone who's either out to
cause trouble or (more likely) simply too anal and literal-minded about rules says "I'm sorry, I don't accept that" and forces you to take it out. Completely at random.
That doesn't sound very reasonable to me.