وَلَنَا تَحْقِيقًا أَنَّا نَجْزِمُ بِالضَّرُورَةِ
Our position, on examination, is that we are certain by necessity.
“Necessity” here concerns foundational cognition that does not always await a long chain of inferential reasoning. Some matters are evident through immediate awareness, while others are made clear by argument.
Perceiving an illuminated lamp or recognizing a basic contradiction provides examples of the kinds of starting points on which ordinary reasoning relies.
Examining particular errors differs from rejecting all possible certainty. This prepares the ground for evaluating skeptical arguments in the next section.