@JeremyECrawford Why can't you stack AC methods? Some foes end up with enormous hit bonus. Many things use VS a stat so it seems reasonable

— Dude Manguy (@SolarFlairPony) October 15, 2016

AC calculations don't stack (you have AC X + Y), but bonuses to AC do (like from a cloak of protection and a ring of protection). #DnD https://t.co/NZkW7cnfAb

— Jeremy Crawford (@JeremyECrawford) October 15, 2016

@JeremyECrawford Do casters/ranged attackers have disadvantage while within my attack range? My character uses a polearm for reach.

— Susan Stoddard (@valoriclight) October 25, 2016

See the rule on ranged attacks in close combat (PH, 195). The rule is based on being right next to a foe (within 5 ft.), not on reach. #DnD https://t.co/UUDMmiKTwd

— Jeremy Crawford (@JeremyECrawford) October 25, 2016

@JeremyECrawford Do Wild Shaped druids or polymorphed creatures count as "shapechangers" for Moonbeam, or only things w/ (shapechanger) tag?

— Dan Dillon (@Dan_Dillon_1) April 18, 2016

A creature must be designated—with a tag or other text—as a shapechanger to count as one. #DnD https://t.co/pz18pNR7eR

— Jeremy Crawford (@JeremyECrawford) April 22, 2016

@JeremyECrawford can giant crabs really grapple any size creature? No restriction in stat block.

— Grant Myers (@realgrantmyers) October 25, 2016

If a spell, class feature, monster ability, or other effect lets you target a creature and doesn't specify size, any size will do. #DnD https://t.co/vQBaMZ5b9v

— Jeremy Crawford (@JeremyECrawford) October 25, 2016

@JeremyECrawford The PHB specifies grappling caps at one size larger. and larger creatures auto-succeed escape checks (w/o grappling feat).

— Nick Miller (@Millatron81) October 25, 2016

See the sidebar "Grappling Rules for Monsters" in the Monster Manual (p. 11). The size material in the PH is irrelevant to those rules. #DnD https://t.co/RlhIiKyPJd

— Jeremy Crawford (@JeremyECrawford) October 25, 2016

@JeremyECrawford is it intentional that the giant crab can grapple anything, or just RAW?

— Grant Myers (@realgrantmyers) October 25, 2016

If we intend for a monster ability to have a size limitation, we note that fact in the ability. #DnD https://t.co/JgQJ5OIrcX

— Jeremy Crawford (@JeremyECrawford) October 25, 2016

@realgrantmyers You're welcome. And thanks!

— Jeremy Crawford (@JeremyECrawford) October 25, 2016

@JeremyECrawford Detect Thoughts: Does the target know the identity of the caster as a result of the save or just that the probing occurred?

— Ian (@CuttableSoup) October 28, 2016

If you didn't witness the casting of a spell, you don't know who cast it, unless a spell or other feature says you do. #DnD https://t.co/qzMHqX1jxj

— Jeremy Crawford (@JeremyECrawford) October 28, 2016

@JeremyECrawford Can you clarify handling multiple stacked "advantage" bonus at once? Having "advantage" and "disadvantage" stacked?

— Daniel Morgan (@danielhmorgan75) August 15, 2016

The Player's Handbook delves into adv./dis. in detail (p. 173). In short: ∞ adv/dis = 1 adv/dis. Adv − dis = 0 #DnD https://t.co/XAMqSbaXtp

— Jeremy Crawford (@JeremyECrawford) August 15, 2016

@quadhundArcane recovery has “once per day” language. Intentional? Yes.

— Jeremy Crawford (@JeremyECrawford) November 16, 2016