re: #205 Anymouse

Sometimes concerted effort can change definitions of words, such as gay.

Happy (antiquated)
Attracted to same-sex (principal definition)
Festive (antiquated)
Disparaging (slang - ex: This game is gay)
Sexually unrestrained (archaic)
Beautiful, noble, excellent (obsolete)
Abounding in social pleasures (older, see Gay Nineties)
dictionary.com

The popular understanding of “theory” and the scientific definition of theory are totally different. It’s more a question of common language misusing the scientific term, than a new definition.

Putting it another way, the popular understanding of the word gay may have changed, but the definition of a scientific theory has not.