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To borrow a phrase, every editor who is not too stupid or too full of himself to notice what is going on knows that propagating the myth of "objective journalism" is indefensible. A newspaper or radio program may try to hide or obscure the fact that the people responsible for its content have opinions, convictions, and biases. But it is impossible to function as a journalist without making subjective judgment calls about newsworthiness, relevance and emphasis, or covering issues about which you have an opinion. Pretending otherwise requires willfully misleading the public.
What does To borrow a phrase mean in the above paragraph?