Indubitably

If your statement is indubitably true, why do I doubt it?

Indubitably.

This is the picture which the more self-conscious intellectuals have formed of themselves, and which they are slowly impressing upon a population which is being led no man knows whither by an indubitably intellectualized President.

Near-synonyms: verifiably, provably

Now his first suspicion was indubitably confirmed.

The world is indubitably one if you look at it in one way, but as indubitably is it many, if you look at it in another. It is both one and many—let us adopt a sort of pluralistic monism.

They were all indubitably, aggressively alive! Everybody was alive once more!