feat(07): fix typos; continue on semantics
feat(07): fix typos; continue on semantics

fpvandoorn/logic_and_proof,soonhokong/logic_and_proof,soonhokong/logic_and_proof,avigad/logic_and_proof,leanprover/logic_and_proof,rlewis1988/logic_and_proof,fpvandoorn/logic_and_proof,avigad/logic_and_proof,rlewis1988/logic_and_proof,leanprover/logic_and_proof,rlewis1988/logic_and_proof,leanprover/logic_and_proof,fpvandoorn/logic_and_proof,avigad/logic_and_proof,soonhokong/logic_and_proof