It has been suggested that nodes in long-term memory can represent complete pictures, but this claim is no longer accepted. Which of the following pieces of evidence related to this claim is FALSE?
a. each person has his or her own idea about how concepts should be defined.
b. many of our abstract concepts (e.g., justice, love, God) are difficult to define.
c. it is easy to find exceptions to any proposed definition.
d. most of our concepts are difficult to express in words.