True versus Correct in uttered speech

In the below passage from MN 58 >In the same way, prince, the Realized One does not utter speech that he knows to be untrue, false, and pointless, and which is disliked by others. >The Realized One does not utter speech that he knows to be true and correct, but which is harmful and disliked by others. >The Realized One knows the right time to speak so as to explain what he knows to be true, correct, and beneficial, but which is disliked by others. >The Realized One does not utter speech that he knows to be untrue, false, and pointless, but which is liked by others. >The Realized One does not utter speech that he knows to be true and correct, but which is harmful, even if it is liked by others. >The Realized One knows the right time to speak so as to explain what he knows to be true, correct, and beneficial, and which is liked by others. Why is that? Because the Realized One has compassion for sentient beings. There seem to be some (three?) couplets (and a triplet?): 'true/untrue', 'correct/false', 'beneficial/pointless/harmful', and 'likeable/dislikeable'. My reason for posting is to ask the difference between 'true' and 'correct', but if anyone has anything more general to say about these guidelines, that would also be appreciated.