List 10 things you know to be absolutely certain.
- The sun rises in the east and sets in the west.
- Water boils at 100 degrees Celsius (212 degrees Fahrenheit) at sea level.
- Every natural number greater than 1 is either prime or can be expressed as a unique product of primes (prime factorization theorem).
- Energy is conserved in a closed system, according to the law of conservation of energy.
- The Earth is an oblate spheroid, not a perfect sphere.
- All bachelors are unmarried men.
- The speed of light in a vacuum is approximately 299,792,458 meter.
- Objects with mass are affected by gravity, as described by Newton’s law of universal gravitation.
- Human beings require oxygen to survive.
- 2+2=4 (in base 10 arithmetic
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