`Binsey Poplars' is a bad poem because it is most irritating poem Hopkins ever wrote."
The writer of this sentence is begging the question of the irritating nature of the poem. A better argument would be:
" `Binsey Poplars' suffers from a surfeit of literary devices."
The statement still expresses an opinion, but the more precise and objective language suggests a way in which the writer can support the claim.