In linguistics, the Principle of Effability asserts that every natural language can express any human thought.

We mentioned previously that certain paradoxes in set theory arose shortly after Cantor's works were published.

In 1227, from his deathbed, as his armies lay siege to the Tangut capital, he ordered every Tangut to be slaughtered. His troops carried out his orders, even though he was dead by the time of the final slaughter. So complete was the extermination that until recently the Tangut were a historical blur virtually erased from history by the Mongols.

Economical function usually has anti-crisis orientation and forms stable economical development of the state.