She realized that didn't sound very intelligent, but after all she hadn't been old enough to pay much attention.

Great, she sounds intelligent, highly political with her nuanced answers, and more of the same.

I grill him pretty good, and I sound rather intelligent.

His question sounded more mature and intelligent than what he really meant.

The argument made sense to him; it sounded intelligent in his own mouth.

"That will take a lot of explosive," Joe said, to sound intelligent.

I'm sure I sounded real intelligent just about then.

His voice was the same as before; in fact, it sounded even more thoughtful and intelligent.

Long words strung together to form sentences which sound intelligent but actually mean nothing.

I'm not certain, Max replied with a laugh, but it sure as hell sounded intelligent.