If a wine looks or smells bad, you don’t have to taste it!
When we “taste” wine, we’re actually performing Sensory Analysis.  We pay attention to each sense in turn in a 5-step process, progressing from the least physical contact with the liquid (visual) to the most (letting it pass your lips).  If a wine looks or smells bad, you don’t have to taste it!  This is known as “The Path of Least Damage!”