Falsifiability in science is a very important concept. For me, a scientific theory deserves serious consideration only if it is falsifiable. Simply put, assume the theory to be false, can we have a method of verifying this physically by experiment or observation? OK, I am Popperian ( Karl Popper another Lutheran) in this regard, I offer no apologies and not ashamed of it because I believe his requirement of falsifiability is common sense.
Example of what is falsifiable: Theory of Gravity: It says what goes up must come down ( spinning wheel ... I won't sing it). Assume this theory is false, is there a way of confirming its falsehood? Yes, throw an object in the air and if it does not land down, you can say - heck Newton was wrong. Ergo: Theory of Gravity is scientific.
Take the case of Theory of Evolution - is this falsifiable? No. There is no physical method of validating its falsehood. Why? You need ions and ions of time and by that time, the experimenter is already dead before he sees evidence of this. So, sorry this is not science. I don't buy it for that reason - it does not meet falsifiability. There is no physical way of observing this phenomenon in action
Aha, but maybe there is!
Enter Kurt Godel (my patron logician - see my picture? another Lutheran , OK you get it I am biased). Godel brought Einstein's Theory of Relativity (ETR) to its final conclusion. Godel calculated that by virtue of ETR, it is possible to do time travel, if you travel at the speed of light.
So how does Godel help falsifiability of Evolution?
Simple, we ask the Evolutionary Theorist when she thought a particular specie evolved to another - she says , this happened according to carbon dating, for the sake of argument, 10Billion years ago.
Easy. We set the time machine to year = -10,000,000,000 years and go there and observe Evolution in action. You can even see that specie giving birth and even die.
Sounds good? Ya with me? No? You think this is nonsense? Well at least deep nonsense.