I answered the phone to a very convincing voice that was breaking up, and the person asked "can you hear me"? Only after I said "yes" did I realize that it was either a very lifelike robot or a very robotic person. For this reason, I fear I'm in danger of falling victim to fraud from a "can you hear me?" attempt phishing for a fabricated "consent" of some charges; I did not give any other personal information to the "person" during the call.
I've unfortunately now said "yes", so what do I do to protect myself? I don't have many lines of credit/accounts open, so I'm not sure what angles of attack someone could possibly have against me, unlike the strategies in the URL linked above.