Board Thread:False Info and Speculative Discussion/@comment-24.130.28.230-20150721180826/@comment-4091815-20160130233121

The show also covered your exception in the dialogue.

Episode 503

Deaton - Don’t worry Stiles, Tracy won’t be able to cross a line of mountain ash. She’s not going anywhere.

Stiles – That’s kind of what I’m afraid of.

Deaton – Well, you and I will be able to get out of here no problem. You two (indicates Scott and Malia) not so much.

Malia - (touches Mountain Ash barrier) Weird.

LATER

Stiles – Hey Deaton, how’d she get through the mountain ash?

Deaton – I don’t know. It’s a barrier no supernatural creature should be able to cross.

Stiles – Scott did it.

Scott – Once but it almost killed me.

Episode 504

Deaton – At the moment I’m more interested in how Tracy was able to get across the mountain ash.

Kira – I thought nothing supernatural could do that.

Deaton – As did I. So, if Tracy was able to cross the mountain ash and no one supernatural can do that…

Scott – Tracy’s not supernatural.

Deaton – Exactly.

If you can cross mountain ash you are not supernatural.