Sampling colored counters without replacement

A classroom bag contains five red counters and three blue counters, all identical except for color. Two counters will be drawn randomly without replacement. Before the experiment, students must calculate the probability that both counters are red and compare it with the result for an otherwise identical experiment with replacement. The bag is thoroughly mixed before the first draw, and every counter is equally likely to be selected at each permitted draw. The teacher records ordered draws only to make the conditional reasoning visible; no extra counter is added. A student argues that the second probability must still be five eighths because the bag originally contained five red counters. Another treats the two colors as equally likely merely because there are two colors.