Sentence examples similar to unconvincing simile from inspiring English sources

A simile?

This argument is unconvincing.

Unconvincing smiles.

A striking simile, no?

But this is unconvincing.

But their arguments are unconvincing.

This is doubly unconvincing.

But that is unconvincing.

But it is unconvincing.

That is unconvincing.

Arthur Massey Bristol Giles Fraser is unconvincing.