Survivor? original? Or numbers matching?

It's subjective. To me:
"Original" means just that. Original. It retains the stuff it came with when picked up from the dealership including paint with regular maintenance and minor repairs excepted. A 1972 Duster car that had everything as delievered, but worn, and with a Holley carb added rather than a Thermoquad on it - is no longer 100% orginal. A car that had the passenger's side repainted because they wiped along a retaining wall in 1973 - is no longer 100% original. A car is original only once. Also note I said as delievered - not as ordered. Dealerships changed a lot of stuff, and repaired damage many owners never saw prior to the buyer taking ownership. A survivor car would be in this group too.
"Numbers matching" means those items that have the ID number assigned to them all match. The stampings on the body, the engine, and the trans for most cars. Using the same example a '72 340 Duster with that Holley could be "numbers matching" - but not "Original".

Can you not have original restored? Or restored to original?

What would you call a car that was restored using all vin matched parts and era correct parts? What would you call a restored car that had all matching vins but a couple none correct era parts? Or are they both just considered restored and in the same class to you?

I do t think there is really a right or wrong answer. Just found some really opinionated posts on my other thread so I thought I might get some different thoughts here.