słaby argument

Don't threaten me, Governor, especially not with a weak argument like that.

Talking about 2008 will help with fund-raising, but it's a pretty weak political argument.

Perhaps, but the ad hominem approach is usually the mark of a weak argument.

"Surely you do not intend so weak an argument in defense of the Deryni."

"He must've had a good reason," he said, knowing it was a weak argument.

But it should be noticed in passing that he uses many weak or dishonest arguments.

It's a very weak argument to tell a citizen of the United States to run for a different office.

Those who oppose statehood typically offer weak constitutional arguments against it.

It was a pretty weak argument, but the troll seemed to accept it.

We stress that if there is a weak argument supporting your belief, you better find out how to strengthen it.