extra white space (e.g., the user typed an extra space between the two names) is unlikely to mean they are two different persons, hence it might be a good idea to detect extra white spaces and deduce that they are the same contact, hence rejecting the input
extra white space (e.g., the user typed an extra space between the two names) is unlikely to mean they are two different persons, hence it might be a good idea to detect extra white spaces and deduce that they are the same contact, hence rejecting the input