166 Invariant tag can or not?

A - feature is pervasive or obligatory2
B - feature is neither pervasive nor extremely rare1
C - feature exists, but is extremely rare2
D - attested absence of feature61
X - feature is not applicable (given the structural make-up of the variety/P/C)10
? - no information on feature is available1

Feature area:
Typical example:
I want to go home, can or not? ‘Can I go home?’; Answer the question, can or not? ‘Do you know the answer to the question?’
Example source:
SgE (Wee 2008: 599); SgE (Mesthrie/Bhatt 2008: 86)
Variety World Region Type Value
Id Primary text Variety Variety Type