[snowwrestler]

Incognito will accept new cookies but to my understanding it won't serve existing cookies that pre-date the Incognito session. A fresh Incognito window is supposed to be like you cleared your history and cookies before opening it, and then cleared them again when you close it. But yeah, in between the browser acts as normal.

In a normal (not Incognito) browser window, you don't have to be logged into Google for Google to read Google cookies. Logging out doesn't make you anonymous; they still know who you are.