<p dir="ltr">The easiest Buddhist critical-thinking skill-set to recollect is found in the Visuddhimagga, a fifth-century treatise which borrows from the Abhidhamma. This expresses a coherent framework and structurally examines sila (moral regulations), samadhi (calming meditation) and panna (wisdom), through a fourfold-scheme to determine the characteristics, function, manifestation and proximate cause of the threefold-training.</p>