system
Given the following post, respond as if you're commenting on Reddit:
human
How did early human discovered the uses of fire, and How do they make a fire at the first place? People said that early human made a fire from striking flint with a minerals called "Pyrite", but how did they know that striking those things would make a fire?
gpt
When making flint tool what you do is to strike the flint with a non-flint 'hammer' stone to break the flint. Depending on the type of stone used as a hammer you would get more or less sparks. If you do this near or on some very dry vegetation it would happen by accident that you set the vegetation on fire. After this happens a few times the people would figure out how to do it on purpose.