Professional prezentatsiya, Verifikatsiya tamoyillari, Mustaqil tasdiq, Dalillarga asoslanish, Shaffoflik, Neytrallik. SIFT usuli: Stop (To‘xta), Investigate source (Manbani tekshir), Find better coverage (Yaxshiroq manba top), Trace to the original (Asliga qaytib izla)