All perceptions can be divided into pain-bearing and pain-free classes

Evidence

Pathematic, Apathematic, to one or other of these denominations may all imaginable sorts of perceptions be referred. Pathematic, viz. such as either themselves consist of or are accompanied by pleasure or pain; Apathematic, such as have not any such accompaniment in any shape. — Jeremy Bentham, The Panopticon Writings, 715

Categorization

• DEFINE: Bentham’s foundational dichotomy of perceptions, pathematic vs apathematic.