Thoughts Guiding Systems Corp.,

Ottawa, Canada.

e-mail:karasik@sympatico.ca

The heuristics are presented in the form of a two column table. The left column lists contradictions, which could be difficult to resolve. The right column suggests contradictions, with which substitute them so that to solve a problem.

Difficult contradiction | Contradiction, which could turn out to be easier to resolve |
---|---|

A has to have property B and has to not have property B | A has to exist and has to not exist |

The value of the object's characteristics X has to be Y and has to not be Y | The object has to have characteristics X and has to not have it |

The value of X has to be Y so that Z happen and has to not be Y for a reason R | Z has to happen when the value of X is not Y and has to not happen |

There has to be X so that there would be Y and there has to be no X so that there would be Z | There has to be Y when there is X and there has to be no Y when there is X |