The phrase "caught him out" is correct and usable in written English.
It is typically used to describe a situation where someone is discovered in a mistake or caught in a lie.
Example: "During the meeting, she caught him out when she presented evidence that contradicted his claims."
Alternatives: "exposed him" or "called him out."
I'm sorry," Mike, the con man, says to his mark Ford, who has caught him out.
For example, as I read through the pages that marked America's transition from "Anglo" to "Euro," I thought I had caught him out.
She had caught him out in his desolation: they were strangers to each other; he might even be angry with her because she'd let him down.
'I slept with him a million times.' Lest there be any doubt about their laddishness, he added that had Lennon had 'a little gay tendency', he would 'have caught him out'.
Having partly succeeded him as the Washington correspondent of The Spectator, I caught him out making a slanderous allegation in print that was backed up, when challenged, only by an unimpressive piece of bluffing and blustering.
— and then suddenly she can picture him, tall and rangy in a swimsuit so tight you could see every crease and fold, the washboard stomach, hair that fell across his face like a raven's wing, Richie Spano, the wise guy, the joker, with his braying laugh and the look on his face when you caught him out that said, I am so far above this.
Liberals saw him as caustic and arrogant, and devoted much effort to attempting to catch him out in self-contradiction.
He stayed one step ahead of any fixed position, so that no one could catch him out in it.
To catch him out, I tried two things - a simple nutmeg, cumin and peppercorn job, and a more complex vinaigrette: both were annoyingly successful.
The onus is on Iraq to disarm, not on the inspectors to catch him out; and if he maintains his refusal to co-operate, how will higher numbers help?
