Anvayavyatireki positive negative vyapti – UGC NET Question

Anvayavyatireki inference uses a combination of positive instances, where hetu and sadhya occur together, and negative instances, where both are absent, to establish vyapti. This dual confirmation makes the universal relation particularly robust. Nyaya often considers this the most complete way of grounding an inference. Hence the pattern described in the stem is termed anvayavyatireki.

Option A:
Option A is correct because anvaya refers to agreement in presence and vyatireka to agreement in absence, jointly capturing the two-sided evidential support for the relation. This fits the description of both joint presence and joint absence.

Option B:
Option B, kevalavyatireki, restricts itself to negative instances and does not rely on positive sapaksha cases.

Option C:
Option C, kevalanvayi, relies only on positive sapaksha instances with no negative comparison class.

Option D:
Option D, sesavat, is part of the temporal classification of inference (effect to cause) and does not specify how vyapti is established.