While Medinan praxis (‘Amal) did contribute most significantly towards “maximizing certainty” in the assessment of authority and implications of legal proofs (adillah), there is no indication however, that Malik (or the Malikis) believed it to be conclusively authoritative, infallible, or universally binding.
Islamic Legal Reasoning in the Formative Period, Brill, Leiden, The Netherlands, 2013, p.133