You are missing the point Sei no Senshi.
They're tongues, nose and eyes told them it was human food, but when the teacher waved the symbol in their face their cerebral cortex told them their limbic system was lying!
Its called branding of the brain. Advertisers use it constantly. All the cars look the they same but put a Mercedes Benz symbol on it and see how many people think the car runs better.
Then theres the reverse example of this in René Magritte painting
"This is not a pipe." Letting you know don't be duped.
The brain goes into semantic override when you get the symbol right
