ESV: The stupid man cannot know; the fool cannot understand this:
NIV: Senseless people do not know, fools do not understand,
NASB: A stupid person has no knowledge, Nor does a foolish person understand this:
CSB: A stupid person does not know, a fool does not understand this:
NLT: Only a simpleton would not know, and only a fool would not understand this:
KJV: A brutish man knoweth not; neither doth a fool understand this.
NKJV: A senseless man does not know, Nor does a fool understand this.