[footfootfoot]

The glass is
a) half full
b) half empty
c) twice as big as it needs to be
d) going to have to be washed. By me. Again.

An optimist thinks this is the best of all possible worlds and a pessimist thinks the optimist is right.


But in regards to your original point, that's how I always think and live. Any design or system that relies on things not going awry is by nature a poor design. Always assume the bottle will leak in your back pack and pack your camera accordingly, it's foolish to rely on things not going wrong in order for your plan to work.