We don't use that for moral truths. We don't use it to measure a value of a good moment we are having with a wife or husband. There is a lot we don't use falsifiable evidence or reasoned argument for. There is a lot that is intuitive.
Also even if that is the single best method to verify reality, it doesn't mean there isn't alternative methods.
Also even if that is the single best method to verify reality, it doesn't mean there isn't alternative methods.