彼の議論は問題点から外れていた。の英語

His argument was aside from the point.

his arguments were somewhat self-contradictory

His argument was most convincing.

The argument weighed with him.

the strength of his argument settled the matter

His argument was based on facts.

His argument is rational.

His arguments are quite inconclusive.

He argues from wrong [false] premises.

His argument was far from rational.

His argument is off the point.

His argument misses the point.

I find no logic in his argument.

He lays hold of the main points of the controversy.

I had him in that discussion.

It's no use arguing with him.

I tackled him on the problem.

His argument is quite inconclusive.

It is no use trying to argue with him.

His argument lacks substance.

His argument was well reasoned.

Driven into a corner, he came roundly up to the statement that two and two may not always make four.

The argument is perfectly logical.

He didn't participate in the discussion.

he argued convincingly

When he was cornered,―driven into a corner,―he came roundly up to the statement that two and two may not always make four.

There were numerous lacunae in his argument.

He lost the thread of the argument.

His remarks are irrelevant to the subject under discussion.

His argument does not have [carry] much conviction.