Rule 301. Presumption and Inference Defined. — (a) Presumptions. A

presumption is an assumption of fact that in a civil case the law requires and in a

criminal case permits the trier of fact to make from another fact or group of facts

found or otherwise established in the action. A presumption is not evidence.

(b) Inference. An inference is a deduction of fact that may logically and

reasonably be drawn from another fact or group of facts found or otherwise

established in the action.

(c) Prima Facie Evidence. A statute providing that a fact or group of facts is

prima facie evidence or proof of another fact establishes a rebuttable presumption

unless the statute expressly provides that such prima facie evidence is conclusive.