In a lab's brain, words can have only one meaning: the meaning which is associated with food. For example, when I give Bruno or Judy a treat from the hand, I say "here" and must remind "take it easy" so I don't get my hand bitten. When we go for our morning walk, Bruno tends to walk in front and may pull so I say "take it easy, slow down". He then gives me the look as if a treat should be coming his way. Or I may say " get back here" and all he hears is "here" and again looks for the promised treat.