A: Three. One to change the light bulb. One to not change the light bulb. One to neither change nor not change the light bulb.
The enlightened ones have no boundaries, but respect those of others.
Four monks were meditating in a monastery. All of a sudden the prayer flag on the roof started flapping. The younger monk came out of his meditation and said: “Flag is flapping”
A more experienced monk said: “Wind is flapping”
A third monk who had been there for more than 20 years said: “Mind is flapping.”
The fourth monk who was the eldest said, visibly annoyed: “Mouths are flapping!”