Recurrences take place due to ascertainable circumstances and chains of causality.

An example is the phenomenon of multiple independent discovery in science and technology, . Indeed, recurrences, in the form of reproducible findings obtained through experiment or observation, are essential ...

In the field of observation, chance favors only the prepared mind." Discovery, like learning, is a phenomena that takes place in the human brain. The brain configures an event as a new pattern based on previous assumptions that were present at the onset of the event.