In a lengthy fatwā dated 755 AH, after explaining that Ibn Taymiyyah erred in his understanding of a specific ruling from the Shāfi‘ī and Ḥanbalī …

Taqī al-Dīn al-Subkī: Firsthand Impressions of Ibn Taymiyyah and the Necessity of Avoiding Him Completely

“He had committed much to memory but did not become refined (in his understanding) via a learned scholar, nor was he trained in the sciences but received them using his intellect, together with audacity, a broad imagination and much confusion.”