“If someone doesn't value evidence, what evidence are you going to provide that proves they should value it?”
— Sam Harris
Simplified Meaning:
When a person does not care about facts or proof, it is very hard to convince them with facts or proof because they don't think these things matter. Imagine you have a friend who believes in something that isn't true, like thinking the earth is flat. You show them pictures from space and scientific research that prove the earth is round, but they ignore you because they don't trust the evidence. This shows that no amount of proof can change their mind if they don't find proof important. The same idea can apply to arguments, debates, or any situation where convincing others with facts is important. If you find yourself in such a situation, it might be more effective to try and understand why the person doesn't value evidence first, and address that issue before presenting your facts.