The part an actor played on stage was once written on a separate roll of paper.

The hypothesis may be put forward, to be tested by the s subsequent investigation, that this development has been in large part a matter of the reciprocal interaction of new factual insights and knowledge on the one hand with changes in the theoretical system on the other.

The staff, stage managers, ushers all behaved as if they respected the actors.

Science is intimately integrated with the whole social structure and cultural tradition. They mutually support one other -- only in certain types of society can science flourish, and conversely without a continuous and healthy development and application of science such a society cannot function properly.

If observed facts of undoubted accuracy will not fit any of the alternatives it leaves open, the system itself is in need of reconstruction.

A theoretical system does not merely state facts which have been observed and that logically deducible relations to other facts which have also been observed.