Meaning of unsubstantial

1. The evidence presented in court was unsubstantial and did not prove the defendant's guilt.
2. Her argument was unsubstantial and lacked any real supporting facts.
3. The rumors about their relationship were unsubstantial and had no basis in reality.
4. The building appeared to be unstable and unsubstantial, causing concern for its safety.
5. His promises were unsubstantial and failed to convince anyone of his sincerity.
6. The artist's work was criticized for being unsubstantial and lacking depth.
7. The company's financial projections were unsubstantial and unrealistic.
8. The book received negative reviews for its unsubstantial plot and lack of character development.
9. The candidate's platform was deemed unsubstantial and lacking in concrete solutions.
10. The theory presented by the scientist was unsubstantial and not supported by any empirical evidence.