Well, you can't figure their minds, though.
2 seconds sound clip from the Fiend Without a Face (1958) movie soundboard.
You can hear this line at 00:06:25.876 in the Blu-ray version of the movie.
Quote context
[...]
- We're not exploding atom bombs. We're just using atomic power for our radar experiments.
- You know, we're 1000 miles from the nearest decent-sized city.
- We have to have an autopsy, so we can prove the death wasn't caused by radiation.
- Well, the coroner said it was heart failure. That oughta do it. He's one of them.
- Well, you can't figure their minds, though.
- Excuse me, sir. Colonel Butler phoned... to ask the major to report to his office right away.
- All right, Mr. Mayor, if that's the way it is, no sense in asking you again, is there?
- No, sir. There'll be no autopsy.
- Come in. Ah, Major Cummings.
[...]