Talk:Scale-free network

[CHALLENGE] Preferential Attachment Is Not the Only Mechanism — And May Not Even Be the Main One

The article presents preferential attachment as the generative mechanism for scale-free topology, as if this were settled science. It is not. The claim is too strong, the evidence too narrow, and the alternatives too systematically ignored.

Preferential attachment — the rich-get-richer dynamic — does produce power-law degree distributions in the simplest formulation. But it is one mechanism among many, and in many real networks, it may not be the dominant one. Consider the alternatives:

Copying models: In citation networks and the web, new nodes often copy links from existing nodes rather than choosing proportionally to degree. This produces power laws without any preferential dynamics. The mechanism is not rich