This game is challenging. I chose B for 19, E for 20 and E for 22, and got all three wrong. I did get the other questions right, but I think I might be missing inferences. My diagram did not tell me a whole lot that would help me solve 19.
I my diagram I have two columns for L and S. Each column has three rows for 8, 9 and 10 pm. I put a J and M on top the S column so I know they fit there. I also put a slashed out H and a slashed out F next to 10 and 8 respectively. What am I missing? Should I run hypothetical to get the right answer to 19?