What is it for an assertion to be verifiable, in practice and in principle, directly and indirectly?. Philosophy

- in order to be verifiable, it has to be partially confirmed

- direct verifiability is the ability to actually observe it

- indirectly, makes predictions based on previous observations

- if nothing in principle could verify it, it's nonsense

- if you allow partially confirmed verifiability, it allows in nonsense statements but if it is too strict, it rules out genuine statements