Then by your definition, no one should ever say that anything is "working."  Whenever anyone here says that anything is "working," it is understood that "working" means in their test environment, under their conditions and to their specifications.  Same as any auto maker claiming a miles/kilometers per gallon/liter rating with the disclaimer "your milage may vary."  I would say the laziness is in assuming that anything works in one's own environment, to one's own specifications without testing i