Chopping a pepper

Clean knife and pepper contact with a steady grip, no artifacts.

Slices separate in step with the knife and the grip stays natural throughout.

Realistic contact between knife and pepper, and the slices separate cleanly.

Natural grip and slices that separate cleanly, but the first chop leaves the pepper intact.

Clean slices that stay where they fall, with two hands and five fingers each; a cut at about 5.5 seconds moves to a wider view. Checked frame by frame.

Slices drop and stack naturally, but seeds are scattered across the board before the first cut while the pepper turns out to have none inside.

Clean slices and two hands throughout, but a cut at about 2 seconds puts the pepper back together whole and swaps which hand holds the knife. Verified frame by frame.

Realistic two-handed grip and the knife passes through the pepper, but slices multiply and reshape between cuts and a loose ring appears on the board around 0:05.

Clean grip and contact, but half of the pepper vanishes after the first cut.

The pepper reads more like a tomato, and the rings seem to appear under the blade rather than being cut.

Realistic grip and knife motion, but a slice clings to the blade and slides along it instead of falling.

FAILURE MODE: pepper slices duplicate and appear simultaneously in front of the blade instead of separating one cut at a time.

FAILURE MODE: knife grip shows finger warping; pepper slices duplicate, float and cling unnaturally to the blade.

The pepper has two stems, and the steadying hand stretches against it while the knife hand blurs during the cut.

FAILURE MODE: a third hand rests on the board next to the knife tip while two other hands hold the knife and the pepper. The cut itself is plausible.

FAILURE MODE: anatomical hallucination, three separate hands appear manipulating the knife/pepper; slices duplicate and slide.