Okla. Stat. tit. 12, § 12-2301: Definitions

As used in this Code:

1. A "presumption" means a rule of procedure that when a basic

fact exists the existence of another fact must be assumed, whether

or not the basic fact has any probative value of the existence of

the assumed fact;

2. "Basic fact" means the fact or group of facts giving rise to

a presumption;

3. "Presumed fact" means the fact which must be assumed; and

4. "Inconsistent presumptions" means the presumed fact of one

presumption is inconsistent with the presumed fact of another

presumption.