Trial and error is a powerful way to learn. The quicker and cheaper our tests and iterations, the steeper our learning curve.
It is all well to desire a culture of experimentation. But, such efforts go sour if we say we encourage experimentation but make a big deal of every (inevitable) misstep.
Therein lies the catch – trial and error come as a package deal.
PS: It is also just as important to make a big deal out of every win. The best way to encourage a culture of continuous learning is to take both in our stride and keep plugging way.