The fallacy of proving too much refers to an argument whose underlying logic, if accepted, would also prove conclusions that are clearly absurd, widely rejected, or that contradict the arguer's own beliefs — thereby demonstrating that the argument itself is flawed.
Example of Proving Too Much
- "All slavery is evil because there are cases where a slave was beaten to death."
This proves too much because the same logical form — "X is entirely evil because some instances of X involve terrible outcomes" — would also prove that all marriage is evil (since domestic violence exists), all driving is evil (since fatal car accidents exist), and all surgery is evil (since patients sometimes die). Since the arguer would reject those conclusions, the argument's logic must be flawed. - "We should ban all fire because fires have burned down buildings and killed people."
This proves too much because the same reasoning would require banning water (people drown), electricity (people are electrocuted), and virtually every useful tool. The argument's logic leads to conclusions the arguer would never accept.
