http://lljcwddkoyjq3xxtchl7a4i3ig6wqrg7nfxuzbzj4k4tbnb6pnzq7kid.onion/index.php?title=Animal_cognition&oldid=771
Concepts enable humans and animals to organize the world into functional groups; the groups may be composed of perceptually similar objects or events, diverse things that have a common function, relationships such as same versus different, or relations among relations such as analogies. [43] Extensive discussions on these matters together with many references may be found in Shettleworth (2010) [1] Wasserman and Zentall (2006) [26] and in Zentall et al. (2008).