Julius and Vincent are brothers. ''We are born within the same hour,'' says Julius, ''on the same day of the same year.'' ''But,'' says Vincent, ''we are no twins!''
How is this possible?

Julius and Vincent are part of a set of triplets, or quadruplets, or even more.

Remark: the situation that Julius and Vincent would have the same father but not the same mother is not a valid solution, because Julius and Vincent would then be half-brothers!