<prompt> Translate the following text to SwahiliIn case study methods, causality is established through the internal consistency and plausibility of explanation, derived additively through the OTTR sequence.  <response>: Katika njia za utafiti wa kesi, sababu huanzishwa kupitia uthabiti wa ndani na uaminifu wa ufafanuzi, unaotokana na nyongeza kupitia mfululizo wa OTTR. 