They trusted to human reasoning, thinking they were clinging to the truth and to sound logic and theory (17:9), and this led them to believe the lie that they were right and God's messenger was wrong.
Sila y nagsitiwala sa katwiran ng tao, na iniisip na sila y naghahawak sa katotohanan at sa mga haka-haka at teorya (17:9) at ito ang nagtulak sa kanila na paniwalaan ang kasinungalingan na sila y matuwid at ang mensahero ng Dios ay mali.