1) I was talking to an engineer and entrepreneur.
Can we be sure that I was talking to one person?
2) I was talking to an engineer and an entrepreneur.
Can we be sure that I was talking to two people?
3) An engineer and entrepreneur walked into the room.
Can we be sure one person walked into the room?
4) An engineer and an entrepreneur walked into the room.
Can we be sure two people walked into the room?
5) He is the son of an engineer and entrepreneur.
Can we be sure one parent is both an engineer and an entrepreneur?
Is the sentence natural?
6) He is the son of an engineer and an entrepreneur.
Can we be sure one parent is an engineer and the other one an entrepreneur?
Gratefully,
Navi