1. The scientist theorises that the new drug will be effective in treating cancer.
2. The detective theorises that the suspect had an accomplice in the crime.
3. The historian theorises that the ancient civilization was destroyed by a natural disaster.
4. The psychologist theorises that dreams are a reflection of our subconscious desires.
5. The biologist theorises that climate change is causing certain species to become extinct.
6. The economist theorises that inflation is the result of excessive government spending.
7. The philosopher theorises that happiness is the ultimate goal of life.
8. The archaeologist theorises that the ruins found in the desert are from a lost civilization.
9. The literary critic theorises that the author's use of symbolism adds depth to the novel.
10. The educator theorises that student engagement is key to academic success.