In Counterintelligence, if two events are very similar, can they be attributed to the same author or agency, and with what degree of veracity?

In Counterintelligence, if two events are very similar, can they be attributed to the same author or agency, and with what degree of veracity?AI Mode reply for In Counterintelligence, if two events are very similar, can they be attributed to the same author or agency, and with what degree of veracit