In the philosophy of religion, Occam's razor is sometimes applied to the existence of God. William of Ockham himself was a Christian.
Quick Answer. The average American bedroom in new homes is between 120 and 150 square feet. Master bedrooms are typically much larger, averaging more than 200 square feet, without taking into account closet space or a bathroom.
Minimum / standard bedroom size (twin/single) by code. I'll start by saying that most building codes (and as it happens, the UK housing act) require a minimum floor area of 70 square foot (eg 7 x 10ft bedroom) with a ceiling height of 7ft 6ins of ceiling height for a room to be 'habitable'.