this was the test that proved jaffa cakes were cakes and not biscuits
biscuits take on water and get soft when they are old and cakes give off water and go dry
(
Griffin Saver Something, something, 2006, something.,
Fri 13 Feb 2009, 12:18,
archived)
it's just like in The Exorcist
(
Mighty Nibus who dares gins | @nibus,
Fri 13 Feb 2009, 12:19,
archived)