# Reserved new files · later information

Release only the page matching a captured first response. Keep both versions. A supported KEEP is valid when the first claim was already careful; explain the decision.


## F1 later

**Source:** The first geometry remains: edges 4 mm and 8 mm, supplied layers 1 mm at 5 min. For this supplied interval, the layer starts at depth d_start = 0 mm when t_start = 0 min. Average front speed = Δdepth/Δtime = (d_end − d_start)/(t_end − t_start). This is the model's interval average, not a constant future speed, intrinsic diffusion coefficient or molecular flux. The separate endpoint lists remain C: 70, 74, 78 s; D: 130, 134, 138 s, with matching material/solution/endpoint rule. New model-plan notes state C was 18°C and D 28°C, with unstandardised stirring. No actual experiment occurred.

**Task:** Keep an already cautious endpoint claim or revise an overstatement, with reasons. Give the unchanged numerical comparison, identify temperature/stirring confounds and propose a controlled size comparison with a defined dependent measure and independent samples. Name one unchanged geometric result. Do not attribute a particular share of the difference to a confound without evidence.