>
>Hm! I now have a supposition.
>
>If Sakuya doesn't meet Gryphon at this point, his personal future
>doesn't happen correctly, which results in the Doctor's personal past
>being altered.
>
>This isn't about not setting something on fire; it's about a paradox
>that would wreck two dimensions, and probably suck a few more into the
>chaos.
>
>Peter Eng
>--
>(Also, there's a non-zero probability that if Sakuya doesn't show up
>when she did, Gryphon gets killed to death in a storm of energy
>spheres.)

I'd still put a few bucks on TARDIS shenanigans. Not lying precisely, but using a convenient excuse. The Doctor has been able to visit other fixed points after all, just not change them in materially important ways, so keeping him well away from this one is most likely for the sake of safety (his and/or other's.)

	-={(Astynax)}=- "By this point the TARDIS has been revealed to be somewhat willful, and bitey, after all."