The study of signs and symbols and their use or interpretation.
Iconic – A simplified accurate representation of an object or action.
Symbolic – An extremely simplified and often inaccurate yet easily recognisable representation of an object or action.
Indexical – An indirect representation of an object or action.
Examples of semiotics.
Without being told at the bottom that its sugar free, seeing the ants who are well known for liking sweet and sugary foods walking away from a piece of food would make you think its sugar free.