It is indeed difficult to fake a DNA test, and a recent actual case reminds us that in human affairs it is never wise to believe that a passing ship leaves no wake. DNA can leave a record that is impossible to eradicate.
DNA 鑑定的確難以造假，近日就出現一個活生生的案例，提醒人們千萬別以為「船過水無痕」，DNA 可是會留下難以抹滅的紀錄的。