Yet there is little real explanation of how semiosis produces its effects, which is odd given that the word "sign" is in everyday use and most people would understand what it means. But semiotics has not offered clear technical definitions, nor is there agreement about how signs should be classified.

As an insect (or any animal, human or otherwise) moves through its environment (sometimes termed the umwelt), all the senses collect data that are made available to the brain. However, to prevent sensory overload,