Thousands of Problems for Theorem Provers

TPTP (Thousands of Problems for Theorem Provers)^[1] is a freely available collection of problems for automated theorem proving. It is used to evaluate the efficacy of automated reasoning algorithms.^[2][3][4] Problems are expressed in a simple text-based format for first order logic or higher-order logic.^[5] TPTP is used as the source of some problems in CASC.