The Scientific Method is based on empirical evidence that can be duplicated and verified by more than one person or group. The operative word here is EMPIRICAL. Empirical: that which is observed or experienced; capable of being verified or disproved by observation or experiment. Here “observation or experiment” are the operative words. All human observation and experience are ultimately and inevitably personal subjective perceptions of sensory input. Our sensory organs are limited and fallible. Our instruments are limited and fallible. There is no absolutely accurate device with which we can measure the results or outcome of any experiment. There is no know absolute constant in the universe with which to measure anything with the possible exception of the speed of light, c; and, even that is an unobservable and disprovable assumption of relativity. Even if there were such a device or constant there is nothing else in the universe to measure that is absolute or constant. Everything is subject to uncertainty, relativity and subject to error and human perceptions. At best we can come up with is an acceptable statistical correlation on which to base or perceptions of objective, material, physical reality. We say knowledge, data, evidence is empirical if it is observable, experienced, verifiable and provable or disprovable yet many closely and favorably held theories are not observable, not experiential, not provable nor disprovable. The Big Bang theory and string or superstring theory are two such theories that come immediately to mind. QM is at best an extremely accurate estimation and not supported by valid acceptable mathematical procedures as its formula and equations are “normalized” to get rid of all those pesky infinities. The point is that every and all bits of knowledge, data, information or evidence whether garnered by experiment, observation or experience is all subject to the limits of our instruments, our senses, uncertainty, relativity and to individual human subjective perceptions. There is no such thing as scientific, objective, empirical evidence, date or knowledge. There is only human perceptions of limited data of unknown accuracy that is statistical in nature that we use to build our models of an ever changing non-absolute universe which is in indefinable part of our reality. We guess at physical reality, the universe and call our guesses empirical evidence. This is not bad. It is the best and only thing that we can do. We must, however, realize that when we put the tag “empirical” on something that does not make it true or absolute. It simply may mean that this is our best SWAG (Scientific Wild Ass Guess).