"Does the flap of a butterfly's wings in Brazil set off
a tornado in Texas?" How can a small change lead
to very large effects? Given a certain amount of initial information, how accurately can you predict over
what length of time how a system will behave? Even a
deterministic system can be difficult to predict because
its future state can be very sensitive to its current state.
This implies that a small difference in the initial
conditions can have a great effect over time.