1. Add a MultiValue String Variable to the model.2. Set the inputs to the MultiValue variable equal to inline variables from the Boolean variables that are to be evaluated.3. Use the Calculate Value Model tool to evaluate the MultiValue variable for whether all values are true, all values are false or a mixture of both. Below is an example of an expression that can be used for this: def getBool(multiValue): boolList = multiValue.split(";") boolSet = set(boolList) if len(boolSet) == 1: return boolList[0] == "true" else: return False