Circular argument. Materialism is a philosophy based on logic, so what you are saying is, "A logical inference can be considered true if supported by empirical evidence, which can be considered true because of the logical inference of materialism".
There are many who would argue that logical does equal true, because the three laws of logic are all supportive statements, and if one of them is taken as false, everything we know about reality that can be deduced by logic comes crumbling down.
There are many who would argue that logical does equal true, because the three laws of logic are all supportive statements, and if one of them is taken as false, everything we know about reality that can be deduced by logic comes crumbling down.