- #176
Hurkyl
Staff Emeritus
Science Advisor
Gold Member
- 14,983
- 26
I gave the example of from seeing smoke one can infer validly that there must be fire. The reason being that fire is the cause of smoke. Logic can determine the truth or falsity of a statement. If someone sees smoke and says there is no fire this statement is wrong. There must be fire because fire is the cause of smoke.
Odd, I saw smoke today and there was no fire.