Have you done some computer programming? I would bet a dollar that you have.<quoted text>
I think you mean proving a negative (to disprove a negative, prove the positive). Actually, the logic isn't all that hard. You can confirm the antecedent by completing the statement, "If <statement>, then God does not exist" and then go about showing the statement to be true. You can deny the consequence: "If God exists, then <statement>" and then go about showing the statement to be false. You can invoke the law of non-contradiction by showing that the god in question is believed to possess qualities that are incompatible with each other.
In each of the first two methods, though, you have to show that the logical relation between the two statements is valid. "If my hair is red, then God doesn't exist" won't do. Nor will, "If God exists, then my wife is fat." The third method has been used to disprove the Bible God to the satisfaction of many people, but that logic could also prove the Bible to be fallible rather than its God to be nonexistent. But the logic does clearly show that if the Bible is accurate, then its God does not exist and that if that God does exist, then the Bible's accounts of Him are flawed. Nor does the logic eliminate the possibility of both a flawed Bible and the absence of its God.
If A > 18
Then Let B = "Legal Age"
Else Let B = "Goin' to jail."