The practice of argument making rests in part on the presumption upon which so much of human discourse depends, namely that "the speaker is telling the truth".
One of the principal things to consider when building an argument is the structure. Like a house, on the off chance that it is very much organized, it will withstand a couple of defects in the detail. However, in the event that you manufacture a deck of cards, even a delicate breeze will blow it down.