User:ConMan/List of numbers that are always odd

The following is taken from this page,^{[dead link‍]} which is a mirror of the now-deleted Wikipedia page of the same title. See also Wikipedia talk:Lamest edit wars/Archive 1#List of numbers that are always odd.

What will math do if 2 and 4 disappears? what if 2 is not a prime and 4 is not a composite?

Many things designated with numbers can be even or odd. Some numbers, however, are always odd. Examples are:

prime numbers other than 2.
Numbers equal to one-half the year of a World Cup year since 1966 or Winter Olympic since 1994
The sum of an even number and an odd number
The sum of an odd number of odd numbers
The sum of any number of even numbers and an odd number of odd numbers
The sum of two consecutive integers
The sum of two numbers which differ by an odd number produced by any succeeding rule and is an integer
The sum of two numbers which differ by a number which qualifies under any prior rule and is an integer
The product of two odd numbers
Odd numbers. (Integers in the form 2k+1, with k an integer)
One more than even numbers.
One less than even numbers
(2m)ⁿ-1 with m an integer and n a positive integer
(2m+1)ⁿ with m an integer and n a non-negative integer
The number of days in February in a leap year, except 1812 in Sweden when February had 30 days
The number of days in January, March, May, July, August, October and December on years in which a human being dies. Throughout the last several centuries, an even number of days in January has been an infallible sign that nobody will die, a fact which hypochondriacs should take note of.
numbers which I could validly add here if I were really, really bored
Leprechauns are odd. And scary.
The number zero plus or minus an odd number.
The years immediately before and after a U.S. presidential election year.
The number of days in a year (except for leap years).
The number of letters in the word odd as written in English.
The number of characters in the string "List of numbers that are always odd", with or without spaces.
The number of oxygen atoms in a molecule of water.
The atomic numbers of gold and silver, but not their sum.
The imaginary unit squared, or i².
e^πi.
The number of stars about which the Earth orbits in a year.
The number of moons of the Earth. (3753_Cruithne in rare cases causes this to be untrue)
The number of feet in a yard.
The minimum number of logical qubits required to perform Shor's algorithm on a given number of bits with arbitrary pair interactions
The total number of runs scored in a baseball game won in extra innings by the home team, except some of those won with a non-solo home run.
The diameter in inches of an EP record unless it is a specially pressed 6" or 8".
3
9001
The number of Aztec priests present at a human sacrifice.
The number of testicles in Lance Armstrongs' scrotum after 1997.
The loneliest number.