logical system, system of logic, logic - a system of reasoning

extrapolate - gain knowledge of (an area not known or experienced) by extrapolating

conclude, reason, reason out - decide by reasoning; draw or come to a conclusion; "We reasoned that it was cheaper to rent than to buy a house"

carry back - deduct a loss or an unused credit from taxable income for a prior period

surmise - infer from incomplete evidence

elicit - derive by reason; "elicit a solution"

conclude, reason, reason out - decide by reasoning; draw or come to a conclusion; "We reasoned that it was cheaper to rent than to buy a house"