Surface concept is concept which is directly connected with hardcoded unit.
Compare with abstract concept.
The biggest groups of the surface concepts are:
“Touch
a wire” is a surface concept (in
case if “Touch a wire” is connected with phrase
dictionary).
If
“ICQ message is received” concept is connected with ICQ peripheral device then “ICQ message is
received” concept is a surface concept.
“Moon” is a surface
concept (if it’s a word).
“Red alert” is a surface
concept (if it’s a phrase).
“Desire to talk” is a surface
concept (if it’s a phrase).
“Play” is a surface concept (if it’s a word).
“When I have played
‘Red alert’” is an abstract concept (because it
does not have direct relations with word dictionary, phrase dictionary, or other hardcoded units).