/ˈpjuːtətɪv ˈfɑːðər/ – Phrase
Definition: người vẫn được coi là bố.
A more thorough explanation: A putative father is a man who is alleged to be the biological father of a child but whose paternity has not been legally established.
Example: The putative father was required to undergo a paternity test to determine his biological relationship to the child.