Crossword puzzle clue "harder to fool"

"... ___ again, harder, harder!" (football cheer)

Alt.country singer Case whose "The Worse Things Get, The Harder I Fight, The Harder I Fight, The More I Love You" comes out tomorrow

Harder to fool

" . . . no fool like ___ fool"

The fool in "A fool and his money are soon parted"

"Any fool can make ___, and every fool will mind it": Thoreau

Act the fool or, alternately, act the fool?

"Who's the more foolish? The fool, or the fool who follows him?" Jedi Master