All confidence placed in another is dangerous if it is not perfect, for on almost all occasions we ought to tell everything or to conceal everything. We have already told too much of our secret, if one single circumstance is to be kept back.
Of course the word chaos is used in rather a vague sense by a lot of writers, but in physics it means a particular phenomenon, namely that in a nonlinear system the outcome is often indefinitely, arbitrarily sensitive to tiny changes in the initial condition