As I understand it, connaître indicates familiarity gained from personal experience, whereas savoir is to know a fact intellectually.
While not a perfect analogue, one can compare this to the distinction between theoretical knowledge and practical knowledge. The former is abstract, systematic and acquired through logic, whereas the latter is acquired by studying "facts on the ground." In theory (or on paper, i.e. according to plan and schedule) a flight may depart at 15:04 and arrive at 16:37, making a 17:24 connection possible; in practice, due to congestion, the plane does not usually reach the gate until after 16:50, making the connection impossible.
The colloquial terms book smart and street smart are related. Someone who is book smart may be an excellent scholar, but lacks the common sense or social skills of someone who is street smart.
English also distinguishes between knowing something (meaning to possess knowledge of something) and knowing of something (having awareness of the existence of something). This is again an inexact analogue to the terms, but one that I would apply to your coworkers: they know of the requirements but they do not know them.
There is an old line from The Simpsons—
Teacher: Do you know multiplication tables? Long division?
Bart: I know of them.
First of all when referring to home as the place of residence we never use a determiner. "at/in the home" refers to "home" in another sense, namely a place where people are taken care of, such as old people's home.
Secondly, "in" implies being inside something: either a physical place ("in the bedroom") or as a member of an institution ("in the army"). "at" indicates location while giving more importance to the function than to the actual location. ("At the theatre")
"I'm in home" is wrong because "home" does not refer to a location you can be inside of (but you can say I'm in my house/apartment etc.).
In your example:
"I'm at home" - I'm in the place where I live.
"I'm in the home" - I'm inside the home (old people's home) - stress on physical location, inside the actual building
"I'm at the home" - I'm at the home (old people's home), could be but not necessarily inside the building.
Best Answer
In my experience a veggie tray will contain mainly raw vegetables perhaps with a sauce or other condiments.
A relish would be made from vegetables by cooking or some other preserving process (such as pickling). So a relish tray would include a range of processed vegetables.
Of course, it would not be uncommon for a single platter to display a mixed array of raw and processed vegetables.