This is the only interface you really get into the amazon catalog. What if you really are looking for shirts that don't have stripes? How would you formulate the query?
Of the first ten hits: Amazon: 7/10 aren't shirts (but all are stripeless) Google: All shirts, one is checked Bing: All shirts, all contain stripes in description.
Not exactly glowing for Amazon, clearly unsupported by Bing.