Think of chaos theory, or at least the pop-science version of it. You brush aside a butterfly today, and the fated hurricane doesn't happen next week. However

Think of chaos theory, or at least the pop-science version of it. You brush aside a butterfly today, and the fated hurricane doesn't happen next week. However if insect-wingbeats and weather-systems used two independent PRNGs, you could safely walk in the garden without changing the meteorological future.