I read somewhere, I think in Sue Tompkin’s book that conjunctions are like blind spots to a person. He/she most probably wouldn’t be conscious of the conjunction. It’s like 2 persons standing side by side, staring ahead in the same direction. There is a limit to the peripherical vision of a person. Therefore, each person in the pair can’t see each other clearly. Hence, conjunctions are sometimes described as blind spots.
Contrast that with oppositions – two persons standing opposite of each other, facing each other. Each person is in full view of the other. Hence, there is potential objectivity with oppositions as “all” information are available. Whether objectivity is exercised is another matter though.