==== Types of negation (used e.g. in Partial Logic): ====
  * {{:pl:miw:piw08_hekateonto:weak_negation.png|:pl:miw:piw08_hekateonto:weak_negation.png}} - weak negation  - expressing negation-as-failure or non-truth
  * {{:pl:miw:piw08_hekateonto:strong_negation.png|:pl:miw:piw08_hekateonto:strong_negation.png}} - strong negation  - expressing explicit negative information or falsity