How does criticism of a transmitter’s belief differ from proving a particular report fabricated?

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

• Every individual report became fabricated by reason of belief alone
• Doctrinal criticism does not replace checking each text and chain
• Doctrinal criticism always confirms personal precision
• Truthfulness and retention need never be evaluated separately