I appreciate your good intentions, but you should consider not writing things on the internet like this - as both of your posts are effectively misinformation.
> As with most experiments
This isn't true. It's absolutely standard in earlier trials of investigational agents to not have any sort of control arm.
> there's a control group (6 patients).
This isn't true. Within the study you posted, there are two different cohorts, with different patient types included.
> The control cohort may not have had cancer at all
This isn't true. The group you're calling a control cohort (cohort 2) must all absolutely have cancer, and are all actively treated with the study drug (TSR-042).