From: red sox 777 | #021
CT Spoilers
Magus acknowledges Crono in the game, definitely. Magus is the one who tells the party they might be able to bring Crono back to life.
That happens after Magus joins the party though, right?
So that doesn't really consist of "acknowledging" him in the sense of a rivalry.
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"I couldn't stand a day without a past or future. I need to live each moment to keep fighting here and now."