The stars have spoken since time immemorial. Better and better we understand what they say:
Not “God exists", but “Science is working.” Celestial mechanics, Bethe-Weizsäcker cycle, stellar evolution, …
The concept of a designer appears as a lack of imagination about the power of self-organization.
The OP's hypothetical question seems to me a bit light invis-à-vis the weighty context of “faith” and the problem of the “hiddenness of God”.