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Mathematics » Logic & Set Theory The negation of a proposition is a new proposition which has the opposite truth value; i.e. if p is true, the negation of p is false and if p is false, the negation of p is true.
Matamaitic » Loighic & Tacartheoiric Is ionann séanadh tairisceana agus tairiscint nua a bhfuil luach fírinne contrártha aici; i. má tá p fíor, tá séanadh p bréagach agus má tá p bréagach, tá séanadh p fíor.