Consider the following premises. If Richard were a police officer, then David is playing tennis. If David plays tennis, then Susan is a scientist. Richard is a police officer or Susan is not a scientist. Can we infer the following from them? The fact that Susan were a scientist does not imply that David is playing tennis.
 From the fact that Richard is a police officer or Susan is not a scientist we can infer that if Susan were a scientist, then Richard is a police officer. Finally, from the fact that if Susan were a scientist, then Richard is a police officer, and that if Richard were a police officer, then David is playing tennis we can infer that if Susan were a scientist, then David is playing tennis, which contradicts that The fact that Susan were a scientist does not imply that David is playing tennis. Therefore, the answer is no.