List 10 things you know to be absolutely certain.
1. The Earth orbits the Sun.
2. Water is composed of hydrogen and oxygen (H₂O).
3. The speed of light in a vacuum is approximately 299,792,458 meters per second.
4. Gravity causes objects to fall towards the centre of the Earth.
5. The genetic information of living organisms is encoded in DNA.
6. The laws of thermodynamics govern energy and heat transfer.
7. Human beings are a species known as Homo sapiens.
8. The universe is expanding.
9. Mathematics provides a consistent framework for understanding quantities and relationships.
10. Life on Earth depends on the sun for energy.
