: Magic makes all kinds of exceptions to rules. I'd hardly
: count this as an error.
I have to agree, in this case. Myth TFL has a level where you destroy one pylon of a World Knot so the enemy can't come through, and another level where the enemy destroys a pylon so you can't escape; Soulblighter has a level where you rebuild a destroyed pylon so that you can escape. Clearly, the Knots need all four pylons to function "properly" (which, I think, means teleporting anyone who knows how to work it), even if a powerful Archmage can get a broken Knot to work for a short time. GURPS makes a lot of errors, but this isn't one.
--SiliconDream