In the context of scientific discovery, what does the phrase 'we now know' often signify?

Answer

That our current best model overwhelmingly predicts X within the current epistemic context.

In discovery, 'we now know' should be interpreted as meaning the current best model, rigorously tested, overwhelmingly predicts a result, which remains robust within the current framework but is still subject to future refinement.

In the context of scientific discovery, what does the phrase 'we now know' often signify?
scienceknowledgelimitationcertainty