Infinite (2021)

Character mistake: Evan's response to "What's gunpowder made of?" was "74% potassium nitrate, 13% charcoal." A "smart man" who "knows everything" should realise that the two total 87% and there's a third ingredient (surfur) needed to comprise the remaining 13%. Gunpowder does not have a single "recipe", so the % of the 3 ingredients can vary. Generally, 75% potassium nitrate (or "salt peter"), 15% charcoal, and 10% sulfur may translate to 74.8%/13.3%/11.9% respectively. The 74.8% should be rounded up, not down? (00:14:00)

KeyZOid

Evan McCauley: What do I know that you need so bad?