Weird syntax error in python 3.x logic -

this question has answer here:

• why 'true == not false' syntax error in python? 3 answers

for reason there syntax error in following logical evaluation:

true not none , not false not not not none

the error can narrowed down statement:

false not not none

where second not highlighted.

this isn't important @ all, interested in why might failing. ideas?

another thing remember is, not , is not three separate operators. in other words, is not not (no pun intended) combination of is , not.

in case of example

false not not none 

python tries pass false , not is not operator. since not not valid operand, syntax error results.