problem-set/geometry/tarski/t8.desc created : 07/16/86 revised : 08/17/89 Natural Language Description : Theorem 8: For all points x, y, z, w, and v, if y and w are between x and z, and v is between y and w, then v is between x and z. Versions : NOTE: all versions use a weighting scheme in which variables (and skolem functions) are weighted high and constants low. t8.ver1 : Original formulation of the axioms, from McCharen, Overbeek, & Wos [Aug. 1976]; uses UR resolution, hyperresolution, and unit deletion. created : 07/16/86. verified for ITP : Untested. translated for OTTER by : caw. verified for OTTER : 07/20/89. t8.ver2 : Reformulation of the axioms, from Quaife [JAR 5 (1989)]. created : 07/25/89. verified for ITP : Untested. translated for OTTER by : caw. verified for OTTER : no proof. t8.ver3 : Reformulation of the axioms, from Quaife [JAR 5 (1989)]. created : 07/25/89. verified for ITP : Untested. translated for OTTER by : caw. verified for OTTER : no proof.