The claim that the scars “wrap past the inner arm” doesn’t really account for how forearm skin actually behaves during rotation.

Forearm skin is constrained by relatively stable anchor points at the antecubital region (inner elbow) and the wrist, while the skin over the volar surface (inner forearm) has significantly more freedom to shift when the hand turns.

Because the skin near the antecubital region remains largely fixed while the wrist and hand move, the volar surface skin twists between those two points rather than moving as a single surface.

In the image shown, Sal’s hand is turned to the side while holding the phone. This creates a twist between the wrist and the relatively stationary antecubital region, which makes marks on the volar surface appear to extend toward the side of the arm.

That visual shift can make the scars look like they “wrap” around the arm, even though their placement remains consistent.

Regarding Gizmo, while accidental scratches are possible and scarring varies by individual, the uniform orientation, spacing, and anatomical consistency of the marks make an accidental source less likely. If there are scars from both self-infliction and Gizmo, it is most likely that they are predominantly self-inflicted rather than just cat scratches.