Given the premise, is the hypothesis an unavoidable conclusion? Premise:  Most menu prices include taxes and a service charge, but it's customary to leave a tip if you were served satisfactorily. Hypothesis: Most customers will tip in addition to the tax on the menus.
 Most menu prices include taxes and a service charge, but it's customary to leave a tip if you were served satisfactorily.###Most customers will tip in addition to the tax on the menus.