I'm having trouble with a noun or metaphor that has the connotation of "definitely produce without exception." Below is the context.
"Note that the tendency to imbue the world with purposes per se is no _____ for belief in the existence of God but can easily set the ground for it because humans, as a species, are highly sensitive to the presence of agents in their environment."
For a sentence this long, it's tricky to write with phrases like "...per se is not able to produce the belief in..." or "per se will invariably lead to beliefs in..." Instead, something short and sweet (or even informal saying just to get the point across) probably works better.
A friend suggested "... per se is no magic brush for belief in the existence of God..." It sounds close to what I have in mind though is this metaphor well understood by everyone?
Thank you in advance!