measly little ball

Astronomer 1: "Nine planets in our System, including Pluto"

Astronomer 2: "No, eight. Pluto is not a planet."

Astronomer 1: "If by the label "planet" you refer to something that is [definition #1], then OK, fine, Pluto is not a planet."

Astronomer 2: "Well seeing as you are so conciliatory, if by the label "planet" you refer to something that is [definition #2], then OK, fine, Pluto is a planet."

Astronomer 1: "So actually we have no disagreement, do we?"