Does google do what they say?

hello de-googlers, just a few questions

1. does google know i have more than 1 account

2. do deleted google accounts actually get deleted? (like name, email and phone number info)

3. if i deleted my activity in myactivity.google.com, does it actually get deleted?

4. can i delete my google(s) account and make a new google account to get a clean slate

5. does whatever i do in incognito mode still be profiled on my google profile?

6. if i …

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