Noah Webster
Positiveness
POS'ITIVENESS, noun Actualness; reality of existence; not mere negation.
The positiveness of sins of commission lies both in the habitude of the will and in the executed act too; the positiveness of sins of omission is in the habitude of the will only.
1. Undoubting assurance; full confidence; peremptoriness; as, the man related the facts with positiveness In matters of opinion, positiveness is not an indication of prudence.