I think this is fair criticism. It's hard to read this blog cause its premise is based on an "appeal to nature" fallacy.
A reason should be given, for what seems altogether inconceivable, how this new relation can be a deduction from others, which are entirely different from it. But as authors do not commonly use this precaution, I shall presume to recommend it to the readers.
https://en.wikisource.org/wiki/Treatise_of_Human_Nature/Book...