Brennan and McHugh JJ stated at [7]-[8]: “When the question of paternity arises and the evidence discloses that one of two or men must be the father but it is uncertain which of those men is the father, a slight preponderance of evidence tending to show that a particular man is the father may be sufficient to establish paternity if that man fails without reasonable excuse to comply with the parentage testing order. [read post]