Would you consider a 16 year old an adult, i.e. a rational agent who is capable of of making decisions on their own? To what extent can you hold a 16 year old, or similarly aged person, accountable for their actions?

There are plenty of rational and responsible young people and just as many adults who clearly are not capable of making their own decisions. States have to posit an age when certain activities can be legally carried out because they use generalizations about how most people are at those ages, but these are just generalizations. Whatever the law says, we should judge individuals case by case where rational action is at issue.

Read another response by Oliver Leaman
Read another response about Rationality