implicit or explicit assumptions, or invariants that can actually vary, should be minimized. Otherwise, try to explicit them with guards and exceptions. This sh

implicit or explicit assumptions, or invariants that can actually vary, should be minimized. Otherwise, try to explicit them with guards and exceptions. This should never happen, so I'll do that - when you think this, stop and put an "if(this) then Error" in your code. Breaking is better than not breaking, lurking, and costing money later. My opinion.