Pick A or B for the scenario, then learn the canonical answer and the case where the other option wins.
Every card is a forced choice against a specific scenario, the point is that neither option is wrong in general. The answer gives the reasoning for the pick and, just as importantly, the conditions under which the other option becomes correct. Cards are drawn with spaced repetition, so the ones you miss come back sooner and the ones you know back off. Progress is kept in your browser.