Part–whole reasoning

Definition

Part–whole reasoning moves between properties of parts and properties of the whole — from sound timbers to a sound hull, or from a heavy cargo to heavy crates. Some properties survive the trip in one direction or both; some do not survive it at all. The reasoning is only as good as the check that this property, this trip, travels.

Memory hook

“Check whether the property survives the trip between part and whole.”

What it sounds like

• Every plank is sound, and the joints besides — the hull is sound.
• The whole shipment weighs a ton, so no crate can weigh more.
• Each voice is quiet, but forty of them will carry.