Gates, Gate keys, and Gate locks

[zot]

Originally Posted by ak_aramis

Either way, it's explicitly making a judgement call, which implies some intellect.

Computation at the least, which was my point earlier :). But TFT magic has a lot of that, see my Implicit detection magic thread for more examples.

I don't think this is a bad thing at all but GMs do need to be aware of potential implications.