In a follow-up video, the narrator of the video claims that some found Toshitaka Suzuki's evidence for animal communication to be invalid, as the "sentences" only contained two words. So, he devised an experiment where the two words were played from two different speakers rather than sequentially from the same speaker, and discovered that the Japanese Tit did not react unless the words came from the same place. This proves that the Japanese Tit is actively interpreting what they're hearing.