What necessarily follows for “I had narrated none” when one is narrated later?

Narrator Criticism: Al-Mughīrah b. Saʿīd, Shaqīq and Jābir al-Juʿfī

• The later transmission may reflect a change after the earlier claim
• The earlier statement necessarily becomes a lie at the time it was made
• It proves all previously unreported texts sound
• It conclusively proves the claimed full collection existed