The final widely shared, though less central, property of associative learning concerns the domain generality of associative learning. Domain generality’s prevalence among associationists is due in large part to their traditional empiricist allegiances: excising domain-specific learning mechanisms constrains the amount of innate mental processes one has to posit. Thus it is no surprise to find that both Hume and Pavlov assumed that associative learning could be used to acquire associations between any contents, regardless of the types of contents they were. For example, Pavlov writes,