There are FACTS and LAW that are indisputable...for example....one day everything that lives, dies. There is a sun in the sky that produces life giving light. There is always an effect to every cause and the effect can not come before the cause. Humans require water, oxygen, and a food source to survive. These are all very known FACTS and to argue against them would be foolish and you would be labeled as insane or ignorant. Evolution is disputable and therefore can not be considered as 100% infallible truth.