In the meatworld, a character's Defense Test is Reaction + Intuition. Same Attributes for Initiative too.
Going by the Astral Attributes Table (SR5, page 314), I see that Reaction in astral is handled by Intuition. Makes sense, since Astral Initiative is Initiative x 2. But then I look under Astral Combat on the next page, and the examples given for both unarmed astral attacks and astral attacks with weapon focus, are opposed by a Logic + Intuition roll. But on the Astral Attributes Table, Logic is the astral equivalent of Agility.
Why isn't Astral Defense Intuition x 2, just like Astral Initiative? Or things in astral are just wacky enough to make Defense Test Logic + Intuition?