Re:
https://www.komando.com/video/komando-p ... ma/706984/

About the serial comma in grammar (aka "Oxford Comma") ...
(IMO) The necessity for a comma depends on the final two things:
pony, dog, and clown - definitely three different things
pony, dog and clown - dog may or may not be a clown
pony, dog and frog - dog is obviously not a frog (no comma needed)

(IMO) Always use the comma but no 'and' ...
unless final two things are the same (then use 'and' but no comma):
pony, dog, frog (lets reader supply their own 'and')
Grandpa: "I'm going to have bacon, eggs, toast, coffee."
Grandma: "Don't you mean 'bacon, eggs, toast, and coffee' ?"
Grandpa: "You have an 'and' - just use that! I'm keeping mine!"
Grandma: "I'll have the same - you can prepare breakfast! "

To recap, this discussion is Tedious, Boring, Silly.
Moderator: "Don't you mean 'Tedious B.S.' ?"
Rod
