It's not inferred-- it's stated directly as point #2 on the "Order of Operations" part, then reiterated: "The application of these concepts appears frequently in Pd code."

Plus there's a whole section devoted to connection order that reads like a "how to" guide for patching by depending on the order in which the connections were made.

Pd-ext should do multiple connections from an outlet in the reverse order from Vanilla, with the most recent connection sending data first, so that the only thing anyone can ever say about mutiple connections from one outlet is that they are used when you don't care about the order of those operations.

-Jonathan