The semantic argument against: "Do not multiply words beyond necessity" ('refudiate')

From online source which disregards 'refute':

"I think she meant “repudiate”, which is to reject with disapproval or condemnation. I think three rules should apply to adding a neologism to our lexicon (boy, isn’t THAT statement a mouthful?): 1) Does the word expand into general usage – no matter who said it? 2) Is there an acceptable definition? 3) Does the word’s definition encompass existing definitions of more than one word, thus helping to simplify an otherwise complex and confusing language?"