### Abstract

An innovative list of 75 logic problems for testing ATP systems was introduced in 1986. The problems are presented in a natural first-order form (FOF), and most of them are also given in an equivalent negated conclusion clause normal form (CNF). However, shortly the introduction of the logic problems, some errata are presented. In particular, Problem 62 was corrected. But recently, it has been discovered that both the CNF and FOF version of the Problem 62 of the errata presented are incorrect. This paper presents the correct version of Problem 62. Problem 62 is on of four variations on the same problem, the others being Problems 17, 33 and 38. The relationships among these problems are discussed. Their CNF versions and an explanation of the relevant of Problem 62 are also given.

Original language | English (US) |
---|---|

Pages (from-to) | 135 |

Number of pages | 1 |

Journal | Journal of Automated Reasoning |

Volume | 18 |

Issue number | 1 |

DOIs | |

State | Published - Feb 1997 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Artificial Intelligence

### Cite this

*Journal of Automated Reasoning*,

*18*(1), 135. https://doi.org/10.1023/A:1005764705033

**Erratum for some errata to ATP problems.** / Pelletier, Francis Jeffry; Sutcliffe, Geoffrey.

Research output: Contribution to journal › Article

*Journal of Automated Reasoning*, vol. 18, no. 1, pp. 135. https://doi.org/10.1023/A:1005764705033

}

TY - JOUR

T1 - Erratum for some errata to ATP problems

AU - Pelletier, Francis Jeffry

AU - Sutcliffe, Geoffrey

PY - 1997/2

Y1 - 1997/2

N2 - An innovative list of 75 logic problems for testing ATP systems was introduced in 1986. The problems are presented in a natural first-order form (FOF), and most of them are also given in an equivalent negated conclusion clause normal form (CNF). However, shortly the introduction of the logic problems, some errata are presented. In particular, Problem 62 was corrected. But recently, it has been discovered that both the CNF and FOF version of the Problem 62 of the errata presented are incorrect. This paper presents the correct version of Problem 62. Problem 62 is on of four variations on the same problem, the others being Problems 17, 33 and 38. The relationships among these problems are discussed. Their CNF versions and an explanation of the relevant of Problem 62 are also given.

AB - An innovative list of 75 logic problems for testing ATP systems was introduced in 1986. The problems are presented in a natural first-order form (FOF), and most of them are also given in an equivalent negated conclusion clause normal form (CNF). However, shortly the introduction of the logic problems, some errata are presented. In particular, Problem 62 was corrected. But recently, it has been discovered that both the CNF and FOF version of the Problem 62 of the errata presented are incorrect. This paper presents the correct version of Problem 62. Problem 62 is on of four variations on the same problem, the others being Problems 17, 33 and 38. The relationships among these problems are discussed. Their CNF versions and an explanation of the relevant of Problem 62 are also given.

UR - http://www.scopus.com/inward/record.url?scp=0031075790&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031075790&partnerID=8YFLogxK

U2 - 10.1023/A:1005764705033

DO - 10.1023/A:1005764705033

M3 - Article

AN - SCOPUS:0031075790

VL - 18

SP - 135

JO - Journal of Automated Reasoning

JF - Journal of Automated Reasoning

SN - 0168-7433

IS - 1

ER -