No.

The decisive moment refers to the photographer's perfect combination of form, idea, composition, light, events and other factors at a specific moment. It refers specifically to the use of snapshots to summarize things of decisive significance in a very short fraction of a second and express them with a powerful visual composition.

The "Decisive Moment" theory was created by Henri Cartier-Bresson, the famous French photographer and founder of Magnum Photo Agency, and it is still a highly sought-after street photography method.