>. We absolutely know that its electric charge is opposite that of the normal matter counterpart. Here is a contrived example calculating a hypothetical quanti

>. We absolutely know that its electric charge is opposite that of the normal matter counterpart. Here is a contrived example calculating a hypothetical quantity X = m * Y. Suppose we observe that X is always negative. By your logic, we would then assume that Y is always negative. This is true if m is never negative, but it is somewhat possible that we would eventually find a situation where m is negative and Y is positive.