**Q**
Yes / no, is the following a verifiable fact?
"Electrons play an essential role in numerous physical phenomena, such as electricity, magnetism, chemistry and thermal conductivity, and they also participate in gravitational, electromagnetic and weak interactions."
**A**
yes
Electrons belong to the first generation of the lepton particle family and are generally thought to be elementary particles because they have no known components or substructure.

**Q**
"The earliest Music was discovered in the 1950s."
Is the above claim true?
Options:
- yes
- no
**A**
no
Music is proven to have existed far earlier than the 1950s.

**Q**
Is the following sentence factually correct?
"Cancun acts as the business and financial district of Mexico and is involved in world trade."
Options:
- yes
- no
**A**
no
Cancun has nothing to to with business, it is a vacation area.