Passage Summary: Mary thinks computers will let regular people bypass experts because they'll have all the info they need, but Joyce argues that having more info actually makes us more dependent on experts to help us make sense of it all.

Reasoning: Mary argues that computer-provided information will allow people to bypass experts, while Joyce argues that increased information historically leads to a greater need for specialists to explain it.

Analysis: Mary and Joyce are debating the social impact of increased information access via computers. Mary believes this access empowers individuals to bypass experts, whereas Joyce uses historical analogy to argue that more information actually necessitates more expert intervention. It is the classic 'I can just Google it' versus 'I need a professional to explain what I just Googled' debate. The correct answer will highlight this specific disagreement regarding whether computers will ultimately decrease or increase our reliance on specialists.