2 sentences

1. 你不能凭空捏造事实。

   nǐ bù néng píng​kōng niē​zào shì​shí.

   You cannot fabricate facts out of thin air.

   Source: Dong Chinese Dictionary

2. 这些话完全是他凭空捏出来的。

   zhè​xiē huà wán​quán shì tā píng​kōng niē chu​lai de.

   These words were entirely made up by him out of thin air.

   Source: Dong Chinese Dictionary