cogent evidence (noun)

1. In the courtroom, the defense presented cogent evidence in the form of cartoons illustrating the sequence of events.

2. In the love story, the protagonist finds a love letter from the past that serves as cogent evidence of their partner's commitment.

3. The documentary filmmaker used cogent evidence in the form of interviews and archival footage to convey the truth of the subject matter.

4. In the investigation of the assassination, the historians analyzed cogent evidence such as eyewitness testimonies and official documents.