An important form of strategic analysis is the search for crucial considerations. (p257) Crucial consideration: idea with the potential to change our views substantially, e.g. reversing the sign of the desirability of important interventions. (p257)

Yes, but... a "crucial consideration" is then an idea that runs counter to answers we already feel certain about to important questions. This means that we should not just be open-minded, but should specially seek out other opinions on the matters we are most confident about.

How can you do this without being obliged to consider what seem to you like crackpot theories?