Table 2. Logic statement reductions showing examples of errors.

	Logic statement	Clinical meaning
Example 1
Original	1 OR (1 AND 2)	(Patient has no ideal body weight on file) OR (Patient has no ideal body weight on file AND Patient has ideal body weight on file)
Reduced	1	Patient has no ideal body weight on file (result depends only on element 1; the value of element 2 is irrelevant)
Example 2
Original	1 OR (1 AND 2 AND 3)	(Ambulatory referral order to care management) OR (Ambulatory referral order to care management AND Referral order scheduling status is not scheduled, expired, appointment canceled, unable to schedule AND Referral order does not have a Misc Flag)
Reduced	1	Ambulatory referral order to care management (result depends only on element 1; the values of elements 2 or 3 are irrelevant)
Example 3
Original	1 AND (NOT 1)	The clinical encounter is an inpatient encounter AND the clinical encounter is not an inpatient encounter
Reduced	FALSE	Always false (result does not depend on the value of its only input, 1)