clarity
Fog and Expert Opinion

Fog as a Noun
Definitions from Dictionary.com
Meteorological Definitions

Thick cloud of tiny water droplets suspended in the atmosphere at or near the earth’s surface which obscures or restricts visibility (to a greater extent than mist)
Olive: I’m foggy on how to interpret “to a greater extent than mist.” And when mist crosses the line and becomes fog.

A murky condition of the atmosphere or a substance causing it
Olive: I get this one, and I would much rather be the cause than the effect!
Metaphysical Definitions

Something that obscures and confuses a situation or someone’s thought processes
Olive: Most of the people I know are in this category. When I try to decipher what they are saying, their thought processes are obscured and confuse me.

A state of confusion or bewilderment
Olive: I do not think I’ve ever been in this state. Have you?
Fog as a Verb
Definitions from The Britannica Dictionary
Meteorological Definition

To cover or become covered with steam (with reference to a glass surface)
Olive: I don’t think this applies to me since, as far as I know, I’m not a glass surface. But sometimes I wish I were.
Metaphysical Definition

To bewilder or puzzle (someone)
Olive: Always fun! And always easy to do!