In this lesson https://studyspanish.com/grammar/lessons/posspro there is written:
"The definite article is usually omitted when the possessive pronoun comes after the verb ser:
El carro grande es mío. = The big car is mine."
I personally encountered once the situation when in one movie scene (translated from English to Spanish) in both subtitles and speaking there was the following:
Este es el mío
It was a scene in which 2 guys were walking and one of them pointed at his car and said it.
So, usually definite article is ommited after the verb "ser" before the possesive pronoun, but not in this case. Questions:
1) Was it correct in this scene to say like this?
2) Even if it is correct, could it be used without definite article in this case?
3) How do you define the exception in which you can use definite article after the verb "ser" before the possesive pronoun?