In science, we >do< actually focus on external behaviour in describing human internal states. https://en.m.wikipedia.org/wiki/Affect_(psychology) https://en.m.

In science, we >do< actually focus on external behaviour in describing human internal states. https://en.m.wikipedia.org/wiki/Affect_(psychology) https://en.m.wikipedia.org/wiki/Affect_(psychology) It's only lay persons who think there's any difference.