force recovery: methods, evaluation, debug log

force.html

@@ -116,7 +116,7 @@ The right calibration also reports <code>depth_offset_mm =
 radius to reach the gel surface.</p>
 
 <p><b>And this dataset cannot settle it.</b> Two independent reasons. Kinematically
-the problem is ill-conditioned: sv₁/sv₂ is 9.87 and
+the problem is ill-conditioned: sv₁/sv₂ is 1.09 and
 1.04, so changing the axis by 60° barely moves any
 concentration score. And the gel's own deformation — a <b>real</b> signal, coherent to
 10.6° between samples 7 contact rows apart — carries the geometry of whatever was touched