I'm not quite sure what the following means:

if you add details to a story, it becomes less plausible" is a false statement coming from human interaction.

I don't care whether it's false as a "human interaction". I care whether the idea can be modeled by probabilities.

Is my usage of the word plausible in this way really that confusing? I'd like to know why... Probable, likely, credible, plausible, are all (rough) synonyms to me.