Three modes
The three modes (Skt. trairūpya; Tib. ཚུལ་གསུམ་; tsul sum, Wyl. tshul gsum) of a logical argument are as follows:
- the reason must be a feature of the subject (Skt. pakṣadharma; Tib. ཕྱོགས་ཆོས་, Wyl. phyogs chos)
- there must be positive logical pervasion (or positive concomitance or entailment) (Skt. anvayavyāpti; Tib. རྗེས་ཁྱབ་, Wyl. rjes khyab)
- there must be negative logical pervasion (or negative concomitance) (Skt. vyatirekavyāpti; Tib. ལྡོག་ཁྱབ་, Wyl. ldog khyab)
Alternative Translations
- Threefold criteria