adverb/a s(ə) kə ʒ(ə) saʃ/
as far as I know, as far as I can tell, to the best of my knowledge
“Pourquoi est-ce que tu ne réponds rien ? Tu n'as pas perdu ta langue à ce que je sache.” — Why do you never answer? You haven't lost your tongue as far as I know.
Synonyms: pour autant que je sache