Take the following as truth: He is endeavouring to make out that there is quite as much evidence against Lawrence as against John ”and I am not at all sure that he will not succeed." Detective-inspector Japp was the first witness called when the trial was reopened, and gave his evidence succinctly and briefly. 
Then the following statement: "He believed that both John and Lawrence were guilty." is true, false, or inconclusive?
Answer: Inconclusive