Optionality

The potential for options. Having options combined with rationality (keeping what is good and removing the bad) is what makes you antifragile in the face of uncertainty. It can be a substitute for intelligence. You don't have to be right that often, just the wisdom to not do unintelligent things and recognize opportunities when they arise - the key is the assessment can be be done after the outcome.

Evolution through natural selection is an example of exploitation of optionality leading to intelligent results, with each state in a biological system being better than the previous one. Nature is a good selection filter of the good and bad through natural selection, where randomness through mutations allows for options.

Trial and error is the expression of an option and is tinkering when it presents small errors and large gains. The rationality consists in not rejecting something that is better than what you had before.