Will's brow furrows, though he dives eagerly into the conversation. It's not every day he has someone with which to discuss temporal theories, after all.

"To be honest, I don't think that's the case--not in my universe, at least. But is that how it functions here? I mean, is that a proven fact here? That you change only a future, not the future, and can continue to exist as you are regardless of any changes?" He pauses thoughtfully, thinking about his only brush with changing the past, when Dr Klein went back and rather accidentally met herself as a baby.

"I wonder how that would function if you were to meet yourself," he muses. "Would that also be safe because you--your other self--would be fundamentally altered from the you who had travelled back just because of your presence?"