Posted - 06/11/2011 : 02:25:00 1. Determine whether each sentence is a "proposition". If the sentence is a poposition, give its negation. Do not give truth values of the sentences that are propositions. Recall: a Proposition is a sentence that can be either true or false, but not both. a) 2 + 5 = 19 b) For some positive integer n; 19340 = 17:n c) The di¤erence of two primes d) Every even integer greater than 4 is the sum of two primes