Did those who said that 'Ali (may Allah be pleased with him) knows the unseen associate partners with Allah?

Question:
Honorable Shaykh, may Allah grant you success. He says: If we hold that believing that anyone other than Allah knows the unseen is major shirk (associating partners with Allah) and kufr (disbelief), then based on that, do we say that those who claim 'Ali (may Allah be pleased with him) knows the unseen have associated partners with Allah? Is this understanding correct?

Answer:
Yes, it is clear. Whoever claims that someone other than Allah knows the unseen, whether 'Ali or anyone else, commits major shirk (associating partners with Allah), except for those whom Allah has informed of it, namely the Messengers (peace and blessings be upon them). It is not possible for anyone other than the Messengers, neither for 'Ali nor for anyone else. This is a mu'jizah (a prophetic miracle) specific to the Messengers.