Under another restrictive account, a narrator once remembered a hadith but later forgot its exact words while accurately retaining its meaning. Conveying that meaning may then protect an otherwise lost legal or scholarly benefit.
This position distinguishes certainty about the meaning from certainty about the words. Someone uncertain of the meaning is not entitled to construct a report from guesswork. Nor should a later reconstructed phrase be represented as the Prophet's exact original wording.
Thus forgetting is not, by itself, a permission. The person must retain a definite and reliable meaning and possess the linguistic skill to convey that meaning without changing its legal or conceptual implications.