From this point, the position has become confused, at least as far as external observers are concerned.

An external observer would never have suspected that one of the world's greatest designs had passed with nothing left to mark its passage.

A complete description of the system can only be given by a further, external observer, and so forth.

An external observer at rest sees things quite differently.

For external observers this surface constitutes what is called an event horizon.

Yet the external observers with more information unavailable to the first observer, know that the model is correct.

The large influence of the Council is not always appreciated by external and internal observers.

How would an external observer know whether the processing of a message by an Actor has been pipelined?

It is often considered a terrorist organisation by external observers.

The external observer believes the system is in the state .