The condition on endowments and consumption patterns (that in the square bracket, generalized to n goods) may be more plausible than that on physical factor intensities, but it needs to be investigated empirically to assess the likely magnitude of the error involved.

SSI education has been empirically investigated and linked to particular outcomes including:

I have thought about it a little, and have some vague ideas, which need to be investigated mathematically or empirically before asserting them.

Even the supernatural cannot be solved from first principles and must be investigated empirically.

In addition, there appear to be population level differences in personality - an animal's characteristic and consistent style of behaviour (Reif & Lesch, 2003) - and stress-sensitivity (suggested by Reuther, 2000), although these differences have yet to be investigated empirically.

The relevance of Ullman's study is that he provides a theoretical account of differential (human) phenomenology that can be empirically investigated, and which if correct would explain how and why these distinct experiences arise when they do.

Pose significant questions that can be investigated empirically.

Chandra Mohanty suggests that the category of woman creates the false impression of a coherent, homogeneous group, which leads to the mistake of assuming that all women are equally powerless and oppressed, rather than generating specific questions about oppression that can be empirically investigated.