There is no need for the scientist to go into whether an observation was made, nor into the who, what, when, or where. The data on which scientific theorizing is based are rather the propositional contents of the instrument readings recorded, or the facts detected thereby.

The concept of intuition is more often used in philosophical theorizing than is the concept of observation in scientific theorizing (proportionately). One reason is that there is (proportionately) more ostensible conflict of philosophical intuitions than there is ostensible conflict of scientific observations. So much for the use of a concept of intuition in philosophical theorizing.

If a shot aimed at aptness succeeds aptly, it is then fully apt, since it is not only apt but also aptly apt. But the full aptness of such an attempt is entirely compatible with its being a horrible murder, if the "hunter" is an assassin and the prey his victim. That hunter's shot may still be outstandingly, fully apt, if it manifests the agent's competence in both archery dexterity and shot selection.

Any defense of common sense must allow that it is revisable.

When the risk of failure is too high, the right choice is to forbear.

In arriving at the relevant theory about the specifics of our faculty of vision we will presumably use our eyes to gather relevant data. Based on such data we come to know about the optic nerve, the structure of our eyes, the rods and cones, etc., so as to explain how it is that vision gives us reliable access to the shapes and colors of objects around us. In reliably arriving at that theory we thus exercise the very faculty whose reliability is explained by the theory. There is no vice in this sort of circularity.

Compare the credit for a football touchdown, which might be shared by the receiver not only with the quarterback, but also with the linesmen who make crucial protective plays, etc. The success of the touchdown play depends on the receiver, it is true; but in a particular case it might depend far more on the work of others.