Abstract
Intentionality is a central feature of our understanding of the world. We
daily attribute intentional states (like beliefs, desires or perceptual states) to explain
the behavior of other agents, and many theories appeal to them to understand
more complex notions. Nonetheless, intentional states are puzzling entities. This
article explains what intentionality is and why it is so important and problematic at
the same time. Secondly, it examines various naturalistic theories, which seek to
show that intentionality is compatible with a scientific worldview. Finally, given that
all extant proposals face significant difficulties, it explores the available options in
case no naturalistic theory can succeed.