There's no time for explanation or introductions. Delta is not in a place to care about those details. Locus has only one lifeline to give him, and he wastes no time in extending it.

"York lives."

And Delta is logic embodied. He thrives, as Taylor does, on patterns. If this, then that. If the voice is telling the truth, then York is dead, and by consequence so is Agent Texas. If York is alive...

The voice is lying. And Texas's fate has not yet been clarified. Variable, not constant. Not determined. Not yet.