mans logic is flawed because when used does not always produce accurent results or truth, you cannont always reason things correctly. example: we say the butler killed mrs smith... but actually she died of natural causes... you see we can reason and detuct and think all we want. but that wont always produce the truth. this is probably the best reason as to why its flawed. it doesnt help the fact that we cannont tell truth from lie in and of ourselves.