id	lesson	site	measurement	aeneas_lean_effect	verdict
L04	The CiC that did not discharge the prover existed, was proved, and was the same size. gen1 shipped a three-valued sound kernel with the exactness theorems; the Slang cone shipped an inexact one.	song-ref-gen1 @ ae688f66 lean/Song/proof/NullProver.lean declares verdict_equal_sound, verdict_distinct_sound, verdict_complete and normalize_fixed	NullProver.lean = 706 lines; src/prover total = 34502 lines. Ratio 49:1. The sound kernel was 2.0% of the prover it was supposed to back.	Aeneas/Lean do not create this option; they make it the default. The 706-line sound kernel is the piece that transfers whole.	keep