There is nothing wrong with the statement, and it means that the speaker/writer thinks another person has such a strong opinion that their view is no longer reasonable.

Is it OK to say "too biased to be justified"

It seems very weird to write too biased to be justified although there is no obvious grammatical mistakes in it

Is it OK to say "too biased to be justified"

It seems very weird to write 'too biased to be justified', although there is are no obvious grammatical mistakes. in it