I was under the impression that it wasn't supposed to be possible for a website to tell that the page was loaded in incognito mode; in fact, I thought it was im

I was under the impression that it wasn't supposed to be possible for a website to tell that the page was loaded in incognito mode; in fact, I thought it was important that they not be able to. As such, how would the page with good analytics even know the user was incognito.