"you're not wrong" = "you're right", however phrasing it as "you're not wrong" usually that there's more to it -- either there's some missing nuance, or the speaker agrees grudgingly or doesn't like this truth or wishes it wasn't so, etc.

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.

Something someone says when they dispute what you're saying but does so in an underhanded way. It's often followed by a "but".

Protip: you can replace many "you're not wrong, but..." statements directly with "I disagree with you because..." and you wont come across badly.