def old_guard(A,B,C,D,E,F,G):
	"""return a falsy value (None) if checks fail, otherwise return True
	this is the "control" for the experiment"""
	# Ignore A without a heavy check on each invocation
	# this kills it right at the function call
	if A:
		return

	for _ in range(1):
		if B:
			break
		if C:
			if D:
				break
			if E:
				return
			if F:
				return
		if G:
			return

	# this is the guarded code
	# it is assumed at this point that the checks passed
	return True