Yes, of course things that aren’t definitive falsifications aren’t definitive falsifications, but there have been fairly definitive falsifications in physics, e.g. the falsification of aether theory. (Asking for a falsification to be literally 100% certain to be a falsification is, of course, too high of a standard)
Yes, it’s also possible to change the description of the theory so it is only said to apply to 99% of cases in response to counterexamples, but this is a different theory than one that says it applies to 99.9% of cases or 100% of cases. This is a matter of calibration.
Yes, of course things that aren’t definitive falsifications aren’t definitive falsifications, but there have been fairly definitive falsifications in physics, e.g. the falsification of aether theory. (Asking for a falsification to be literally 100% certain to be a falsification is, of course, too high of a standard)
Yes, it’s also possible to change the description of the theory so it is only said to apply to 99% of cases in response to counterexamples, but this is a different theory than one that says it applies to 99.9% of cases or 100% of cases. This is a matter of calibration.