We all know that “Two wrongs don’t make a right” and “A stitch in time saves nine.” These and other handy proverbs provide nutshell explanations of broader concepts. Even in first century Israel, people wanted short clarifications of complex things. In their pre-internet, pre-printing press era, Israelites exchanged information and got their educations by questioning Jewish Teachers, or Rabbis, in formal gatherings.
As a Rabbi, Jesus constantly fielded questions, even from know-it-all religious leaders (Mt 22.34-36). The Israelites had numerous rules, Mosaic Law and Talmud, while Gentiles had little if any familiarity with the Old Testament, and neither knew what to do.