Politesse,
If someone claims that an invisible being might reasonably plausibly have [done anything at all], then how would people proceed at detecting it?
What anyone believes (or doesn't believe) about how the universe came to be (or whether or not it did) doesn't matter.
How does anyone, theist or atheist, go about detecting invisible beings?
hmm... what about massive stars that die?
Sorry about the word-choice - I should have said "undetectable" instead of "invisible". Also stars aren't beings or agents.
The issue I wanted to figure out was, in the absence of answers to a question, does undetectable "agency" become reasonable as a possible answer to the question?
Even if (like is the case with God) the "agency" just keeps getting proposed time and again but is never found anywhere, across centuries even, is it reasonable to say it's one of contenders as an answer to "how'd the universe come to be?"
Nobody's given me a reason to change my mind from "no, god as a 'possible answer' is not reasonable".