ARGUMENT n.
A reason or reasons offered in proof, to induce belief, or convince the mind; reasoning expressed in words; as, an argument about, concerning, or regarding a proposition, for or in favor of it, or against it.
FORCE n.
city of exercising an influence or producing an effect; especially, power to persuade, or convince, or impose obligation; pertinency; validity; special signification; as, the force of an appeal, an argument, a contract, or a term. He was, in the full force of the words, a good man. Macaulay.