そう言う / そういう (anaphoric reference)

そう ('like that') combined with 言う ('say') as そう言う, or as そういう ('that kind of'), functioning as anaphoric reference — pointing back to something just stated or contextually understood without repeating it. Common forms: そう言った ('said so'), そう思う ('think so'), そういう人 ('that kind of person'), そういうわけで ('for that reason'). Reduces verbosity by reusing prior context.