1 Incremental and reeexive information Elwood lies on a hospital bed, a thermometer|we'll call it t|in his mouth. Bad news about Elwood: (1) The fact that the mercury in t is above 98.6 carries the information that Elwood has a fever. The fact referred to we call the signal or indicating fact. The thermometer is the carrier of the signal, the property of containing mercury that has risen past 9...