[Ken H]

Next we'll be seeing a list of the definitions that we're supposed to accept. Because they say so.

The American Heritage® Dictionary of the English Language: Fourth Edition.  2000. 

theory 

1. A set of statements or principles devised to explain a group of facts or phenomena, especially one that has been repeatedly tested or is widely accepted and can be used to make predictions about natural phenomena.

2. The branch of a science or art consisting of its explanatory statements, accepted principles, and methods of analysis, as opposed to practice:

[x5452]

Widly accepted, you mean like the geocentric theory. :)