A man has 42 socks in his drawer: 12 blue socks, 14 black socks, and 16 red socks. The lights are out and he is completely in the dark at night. How many socks must he take out of the drawer to make 100 percent certain that he took at least 2 black socks out of the drawer? Let's first prepare relevant information and make a plan. Then, let's answer the question step by step (pay attention to commonsense and logical coherence).