As for turning toward and reflecting on it, doubt will no longer remain, because it is inherently aligned with the truth, especially when considered as a whole,

5▪️As for the Kufr of hypocrisy (النفاق), it is when one outwardly professes faith with the tongue, while secretly harbouring disbelief in the heart. This is the major form of hypocrisy. [Madārij As-Sālikīn (1/520-522), Aṭā'āt Al-‘Ilm Edition]