Theory 60/Goosebumps/Ratio lens
Bump Density Is Follicles per Area
The claim
Goosebump prominence is set by the ratio of follicle density to skin area, so the same contraction is coarser on the forearm than on the neck.
01Mechanism
Each bump is one follicle; density determines how the contraction reads visually.
02Prediction
Prominence should track follicle density.
03Refutation
Prominence tracking muscle contraction would remove density.