Logical deduction. Clearly, Dr. Jones is simply opting for the optimal treatment and since they are a medical doctor, they are logical in trusting their judgement on the matter. In the case that Jones was not a medical doctor, it may not be logical to follow their own judgement as they are not trained or educated to sufficiently opt for the best treatment for a condition like anxiety. But, since Dr. Jones is trained and educated sufficiently, they can deem their opinion the logical option, deducted from a field of data, I am assuming.