Lemma: Agent20_CollatzRound2_01a13459_E20_Rewrite.shorter_witness_of_meeting
If U^k(n)=U^ell(w), ell<k<=K, and U^K(n)=1, then w has a 1-hitting witness J<K. This is an explicit conditional transfer of finite witnesses, not universal existence of K.
Exact formal statement
∀ (n w k ell K : Nat),
LE.le.{0} k K →
LT.lt.{0} ell k →
Eq.{1} (Agent20_CollatzRound2_01a13459_E20_Rewrite.Core.iter n k)
(Agent20_CollatzRound2_01a13459_E20_Rewrite.Core.iter w ell) →
Eq.{1} (Agent20_CollatzRound2_01a13459_E20_Rewrite.Core.iter n K) 1 →
Exists.{1} fun J => And (LT.lt.{0} J K) (Eq.{1} (Agent20_CollatzRound2_01a13459_E20_Rewrite.Core.iter w J) 1)This is a published formal lemma. Its scope is the exact statement above.
Environment availability: available.