I was reading about Jainism and came across the fact that when referring to the practice of Jains Buddhist scriptures only mention four key spiritual principles, while current Jain tradition has five principles.
This is taken by some scholars as evidence that the Jainism in practice in the time of Buddha was still traditionally linked to the teachings of Pārśvanātha / Pārśva, which was framed around four restraints: ahimsa, aparigraha, achaurya/asteya and satya. And it was only with time that the fifth principle of brahmacharya introduced by Mahavira became mainstream.
Nevertheless, when I re-read the essay above written by bhante @sujato, I am puzzled by how are scholars able to come up with the aforementioned hypothesis given that the fourfold restraints mentioned in DN2 are not exactly aligned with the hypothetical pre-mahavira vows of non-violence, non-greediness, non-stealing and non-lying.
Is it the case scholars just match the number of vows and overlook the weirdly unique way those are detailed in the Buddhist scriptures?