Meaning of unconvincing

1. The defendant's alibi was so unconvincing that the jury found him guilty.
2. The sales pitch was very unconvincing, and I didn't end up buying anything.
3. Her excuses for being late were so unconvincing that I knew she was lying.
4. The actor's performance was unconvincing, and it took away from the overall quality of the play.
5. The witness gave an unconvincing testimony that didn't hold up under cross-examination.
6. The politician's promises were so unconvincing that the public didn't trust him.
7. The student's explanation for not completing the assignment on time was unconvincing.
8. The teacher found the student's excuse for not doing their homework to be unconvincing.
9. The suspect's alibi was unconvincing, and the police were able to poke holes in his story.
10. The scientist's theory was unconvincing and lacked sufficient evidence to support it.