Replacing A with 'coffee' and B with 'tea' may be useful, here. It seems reasonable to me to not know offhand whether you prefer coffee or tea - I suspect most people have never thought about that directly - but most people would still know that they'd prefer (for example) an espresso from Starbucks (A1) to a cup of Earl Grey (B1), and either of those to a cup of coffee from the local diner where the coffee always tastes like soap (A2).