Hal has trouble sleeping at night. so, his doctor prescribes him some sleeping pills that him sleep. however, after a couple of months the pills do not have the same effect, so his doctor asks him to increase the dosage he takes. in this scenario, hal is demonstrating

In the scenario in which accept to increase the dosage of pills he takes, according his doctor, despite the fact that after a couple of months the pills do not have the same effect, means that Hal is demonstrating tolerance. He has tolerance that the pills need time to be effective and believes what the doctor says. 

Fixing the errors and resubmitting it