In the past, in order to eat assured vegetables, many consumers like to buy vegetables with insect eyes, they think that such vegetables have not been pesticide-protected, because if they are pesticide-proof, insects will definitely not eat such vegetables. Most consumers have changed their minds. If the following judgments are true, which one can explain the change in consumer perceptions? ['Vegetables have bug eyes, indicating that the bug has eaten vegetables.', 'If the worm will eat a certain vegetable, the vegetable must not have been pesticides.', 'If the vegetables are pesticides, the bugs will not eat.', 'Vegetables with insect eyes may also be pesticides, because pesticides can be sprayed after insects.']