The book "Lateral Thinking" by De Bono discusses the difference between two types of thinking: vertical and lateral.

Vertical thinking means always being correct and making judgments at every step. On the other hand, lateral thinking allows for making mistakes while searching for a solution. Needing to be correct all the time can limit creativity and progress, while delaying judgment can lead to new discoveries and ideas.

To apply this concept, it's important to explore ideas and delay judgment in order to find the most useful solution.