Fools meaning

There aren't many fools climbing alone.

"None but fools trust to luck in play," Dolokhov had then said.

Langeron's objections were valid but it was obvious that their chief aim was to show General Weyrother--who had read his dispositions with as much self-confidence as if he were addressing school children--that he had to do, not with fools, but with men who could teach him something in military matters.

"Remember, we're not fools at my end," Brennan said with a hint of defensiveness.

Though lately, I'm surrounded by fools with bad ideas.