If we arrive at something which contradicts it, we aught pause and reconsider.
There is a lot to reconsider. We have definitions of two concepts for verification, testability and falsifiability, both useless, less and more.
Wikipedia says testability is falsifiability with added concern that “there is some real hope of deciding whether it is true or false”, one day. Could it be any more vague? Of course, just take that whole part out and we get falsifiability, completely open to interpretation, or worse, without any interpretation.
Testability implies falsifiability, making it redundant, but scientific theories are defined by both testability and falsifiability, so there must be some real difference between the two or something doesn’t add up.
Wikipedia on testability has a bit of information that is completely missing from the falsifiability article itself -- falsifiability means counterexamples to the hypothesis are logically possible -- whatever is that supposed to mean and however it is supposed to apply in practice, or not.
Obviously now, definition of falsifiability needs to be far more specific, and if testability has additional concern of practical viability for experimental verification, then falsifiability must deal with the additional concept of ‘counterexample’ and narrow it down, or it remains pointless. Let me illustrate...
a.) I hypothesise life after death and predict all kinds of phenomena like near-death experience, ghosts, communication with the dead. Are those falsifiable predictions? Are they testable?
b.) I hypothesise many worlds, infinite number of universes and predict we will be able to see some kind of overlap when we discover super-strings or build a telescope three times the size of the Moon. Are those predictions falsifiable? Are they testable?
c.) I hypothesise consciousness is ‘integrated information’, it’s just how integrated information feels inside, and I can accurately predict levels of consciousness in awake, sleeping, anesthetized and comatose people. I also accurately predict already known observation that cerebellum is not relevant for consciousness. My hypothesis has been independently confirmed many times with strong evidence, it’s a theory, but are my predictions falsifiable?
d.) I hypothesise photons are made of unicorn tears, and I explain everything with a story that makes sense as much as quantum mechanics, but my equations are the same as QM, so I make all the same predictions and my theory is already validated as much, but can my predictions really be considered falsifiable? And even if they can, does that necessarily mean my hypothesis is falsifiable?