That didn't work out right at all, due, for a change, to my typically obscure writing style, so I"ll start over...
SMS and
MMS text messages use the telephone network and telephone numbers as sending and receiving addresses....
iMessages are an
Apple only convention that sends text messages to other Apple devices via the email system using email addresses to identify the sender and receiver.
Those quotes imply that texting is
exclusively between phone numbers and iMessaging is
exclusively between email addresses, and I was trying to point out that I can send iMessages to
either a phone number OR an email address from either my MBP or iPhone.
And SMS/MMS texting doesn't enter into the equation in any way shape or form, because cell service is not enabled on my iPhone.