| No TPTP formula. May not be expressible in strict first order. | Food.kif 1982-1982 | Mollusk is a subclass of seafood |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 1988-1988 | Abalone is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 1991-1991 | Clam is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 1994-1994 | Conch is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 1997-1997 | Loco is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 2000-2000 | Mussel is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 2003-2003 | Oyster is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 2007-2007 | Scallop is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 2011-2011 | Water snail is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 2014-2014 | Cuttlefish is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 2017-2017 | Octopus is a subclass of mollusk |
| No TPTP formula. May not be expressible in strict first order. | Food.kif 2020-2020 | Squid is a subclass of mollusk |
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