it's all that...

"What is that?", asked a man.
"That that it is", replied a second man.
"That 'that' that it is is odd", responded the third.
"That 'that' that that man inquired about has confused me", said a fourth man.
"That 'that' that that 'that' was refering to is the question", retorted the fifth man.
"That that that 'that' that that first man wonderded about is pointless" replied the sixth man.
But the seventh man simple said, "it's all that".

--DDTM