A group of teenagers of different ages participated in a survey where they were asked to evaluate the actions of individuals who caused harm, some doing so on purpose and others by mistake. When asked about suitable consequences for those who caused harm, the younger teenagers, unlike the older ones, suggested consequences that did not change based on whether the harm was intentional or accidental. This suggests that younger teenagers do not consider intentions important when determining consequences.

Which of the following, if true, would most seriously weaken the conclusion above?