The Gumball machine hypothesis of prayer isn't even held by fundementalists but is held by antitheists and I believe those who seek to scientifically research prayer.
There is no 'hypothesis' of prayer - no-one is suggesting that it actually works, it seems, but everyone's calling for it.
To make Dawkins objections to NOMA work it is critical that the accepted definition of prayer be twisted to the Gumball machine conception of it.
What 'accepted definition of prayer'? As with everything else, it's alluring, deceptively, metaphysically vague - it's something that's definitively good because someone says so, somewhere, it doesn't actually do anything but you must do it or badness, except that it's not what gods or heavens are about.
There is no more an accepted definition of prayer than there is an accepted definition of Christianity, or god, there are just conflicting opinions in the absence of any actual evidence or phenomena.
O.