Can Hear?

The speaker walks into the hall. The audience starts to quiet down. The speaker places his materials on the table. He thens takes his place infront of the audience. He could see that some of his audience are seated quite far away from him. He takes the microphone, switches it ON and says

"Can you all hear me at the back?"

And the audience at the back replies

"Nooo............. Cannot hear..!"

Duh!! Dun't u tink that's dumb? How could they reply to the speaker if, in the first place, they cannot even hear what the question was!? Stupid lah! If cannot hear, there shouldn't be any reply at all!

As always, humans never fail to amaze me.