One answer would be that an incoherent proposition is not a proposition, and so doesn’t have any probability (not even zero, if zero is a probability.)
Another answer would be that there is some probability that you are wrong that the proposition is incoherent (you might be forgetting your knowledge of English), and therefore also some probability that “the green is either” is both coherent and true.
One answer would be that an incoherent proposition is not a proposition, and so doesn’t have any probability (not even zero, if zero is a probability.)
Another answer would be that there is some probability that you are wrong that the proposition is incoherent (you might be forgetting your knowledge of English), and therefore also some probability that “the green is either” is both coherent and true.