Cookies, browser characteristics, user behavior, etc. Just because a certain bit of information could theoretically be used for fingerprinting users, doesn't mean any system that uses that information is doing fingerprinting.
Agreed, but it's incredibly naive to assume they are not. Google's product is it's users, and it's a known fact they manipulate results based on what they want you to think or what they think you want to see. They are completely shady on privacy.
I don't know why HN seems to be so stubborn about things like this. It's clear as day they fingerprint users, but seems like the majority of users here refuse to believe a corporation or government has done anything wrong unless they literally admit it in a press release.