وَمَا ثَبَتَ مِنْهُ أَي مِنَ الْعِلْمِ الثَّابِتِ بِالْعَقْلِ بِالْبَدَاهَةِ
And what is established through reason immediately or self-evidently.
كَالْعِلْمِ بِأَنَّ كُلَّ شَيْءٍ أَعْظَمُ مِنْ جُزْئِهِ
As in knowing that a whole is greater than its part.
A self-evident judgment does not require a separately constructed chain of proof once its concepts are grasped. It does not follow that every person understands the terms at the same stage of education. Conceptual confusion may produce verbal disagreement without discrediting the underlying judgment.