Jon ate the same amount as Matt.
The two amounts that are the same are and .
We can't tell yet which person ate which of these two amounts.
Tommy ate more than Matt did.
The only amount more than or is .
So Tommy must have eaten of his brownie.
Brenda ate more than Craig ate.
The only amounts left are and .
One fourth is greater than .
So Brenda must have eaten of her brownie.
Craig must have eaten of his brownie.
Matt's brownie was cut into more pieces than Jon's.
Matt must have eaten , because that brownie was cut into 4 pieces.
Jon must have eaten , because that brownie was cut into 2 pieces.