http://u.qdnx.org/file/rozzin-20190703T143301-qd3bgp8.html
So, "what am I doing when I get a new key from someone and check the signatures to see if there are any people in common" depends heavily on what you mean by "check the signatures" and "people in common". If you mean "trace through signature-chains with no #trust #metrics to find *reachable* signatures", then no you're not using #WoT verification, you're making your own inferences based on something else.