Competição intelectual

Three monks were walking back from a Dharma teaching with their Master. As they arrived back
at their village they noticed a flag on a post, fluttering in the wind. The first student looks up says,
"I see a flag flapping." The next student looks up and, trying to out-do the first, says, "No, I see
the wind flapping." The third student even more sure of his superior understanding, glances up
and says, "I see the mind flapping."
Then their Master looks up and says, "And I see mouths flapping!"