Complete neutral source
Complete original fictional path-display diagram account. Trial1 uses the same printed centimetre scale and base direction for drawn strips UandV: Uspans0–4cm; Vspans0–7cm. Before this supplied diagram comparison, the fictional helper predicted V’s drawn base would be longer using its visible longer-looking outline. Trial2’s note says Uwas read along a different diagonal direction, but supplies no length. The reader job is an accurate base-length display, not choosing the strongest paving rock. Real rocks, walking performance and material hardness are not tested. A separate proposed actual plain-paper comparison would align a familiar ruler zero, read the same base direction and record actual cm readings; no new outcome is supplied.