Another is the pretext theory that presents a hypothesis that Fukai-no-Joten/ Fukaijoten was not established by Emperor Tenchi, but it was posteriorly written under the pretense that it was set up by Emperor Tenchi.
不改常典は本当は天智天皇の作ではなく、後に作られて天智制定と偽ったのだとする仮託説もある。