Assertion (noun)
عمل توثیق، حتمی موقف، اقرار واثق
a confident and forceful statement of fact or belief.
Example: “his assertion that his father had deserted the family”
Pernicious (adjective)
نقصان دہ، مضر،
having a harmful effect, especially in a gradual or subtle way.
Example: “the pernicious influences of the mass media”