Short for "Trancendental argument for Gods existance" which is sometimes used in christian apologetics . Many variations exist but TAG ussually ends up like this :
1.The universe requires an ultimate source of logic to exist that is untouchable
2.I pressupose #1 . If you question this your an idiot .
5.Only the christian god meets these claims
6.Therefore , god exists .
TAG has been shown to be false many times , however since the main drive behind TAG is a pressuposition most TAGers ( A TAGer is an apologist who believes that TAG is a valid argument and constantly defends it )will never learn .
"Im right because I know Im right because some uber dude says Im right so I know Im right because of TAG !!!"