The article discusses the evolution of multiple memory systems in animals and humans, arguing that functional incompatibility between environmental demands and memory systems leads to the development of distinct memory systems. The authors propose that memory systems are specialized to handle specific functions, making them incompatible with other functions. This is supported by examples such as song learning in birds and spatial memory in primates. They also discuss the concept of exaptation, where features evolved for one function can be co-opted for another. The article reviews evidence from various fields, including neuropsychology and cognitive psychology, suggesting that multiple memory systems exist. It also explores how functional incompatibility explains the evolution of distinct memory systems in animals, such as the difference between song learning and food caching. The authors conclude that while some memory systems can handle multiple functions, others are specialized for specific tasks, leading to the need for multiple memory systems. The article also discusses the distinction between memory systems in humans and primates, such as procedural and declarative memory, and how these systems may have evolved due to functional incompatibility. The authors argue that the existence of multiple memory systems is supported by evidence from various studies and that functional incompatibility is a key factor in their evolution.The article discusses the evolution of multiple memory systems in animals and humans, arguing that functional incompatibility between environmental demands and memory systems leads to the development of distinct memory systems. The authors propose that memory systems are specialized to handle specific functions, making them incompatible with other functions. This is supported by examples such as song learning in birds and spatial memory in primates. They also discuss the concept of exaptation, where features evolved for one function can be co-opted for another. The article reviews evidence from various fields, including neuropsychology and cognitive psychology, suggesting that multiple memory systems exist. It also explores how functional incompatibility explains the evolution of distinct memory systems in animals, such as the difference between song learning and food caching. The authors conclude that while some memory systems can handle multiple functions, others are specialized for specific tasks, leading to the need for multiple memory systems. The article also discusses the distinction between memory systems in humans and primates, such as procedural and declarative memory, and how these systems may have evolved due to functional incompatibility. The authors argue that the existence of multiple memory systems is supported by evidence from various studies and that functional incompatibility is a key factor in their evolution.