The proposition that if anything can go wrong, then it will.
The proposition that all work will inevitably expand to fill whatever time is allotted for it.
Also called the scientific Law of Parsimony, this is the proposition that, all things being equal, the simplest explanation of a phenomenon tends to be the best (not the "correct" one - "best" defined as functionality).
The proposition that the computing power of computers doubles every 18 months.
The proposition that the value or power of a network grows exponentially as the number of people using it grows.
It is not possible to move form the description of a natural behavior to the assertion of a norm without presupposing another thesis (i.e., that what happens is good in itself).