Originally posted by mikhael
Exactly. interaction is a two way process. You cannot "simplify" things by seperating action from reaction. To do so is to introduce a false dichotomy between action and reaction or cause and effect.
Bah - I knew that would confuddle the issue. I know very well what you mean here; the simplification was intended only for grammatical purposes and for clarity. Here's the section rewritten with the definition substituted in...
We know that no agent inside the universe can transmit or convey information outside the universe of its own accord. But is the reverse true? Can we be sure that no agent outside the universe can convey information inside the universe?
Think of the universe as a large bubble. It's a self-contained, self-sufficient, closed system. Any information from inside the bubble directed outward will be unable to escape the bubble's border. But anyone can come along and poke a hole in the bubble from outside - "open" the system, as it were.
Take the story of Elijah on Mount Carmel (I Kings 18). The burning of the sacrifice clearly involved the addition of heat energy in a way not consistent with physical law. However, the law of conservation of energy was not violated
per se because the energy was not created from within the universe - it was added into the universe by an external agent. To say that the law of conservation of energy was violated here doesn't make sense, since our physical laws have no control over what happens outside the universe. They are self-consistent, but they cannot prevent an external agent from interfering with them.
Compare this with the proverbial apple falling from a tree. Gravity dictates that the apple will fall to the ground. But if someone reaches out and catches the apple, this will not happen. That doesn't mean the law of gravity is violated. Some agent acted to interfere with it.