Strange behavior of logical variable to not operator

Here I have analysed 12 different cases of logical variable find
its behavior to not operator.

My script is attached

The output is as follows.

Please note the potions with red font colour.

I am using NCAR Command Language Version 5.1.1 on Fedora 11 operating
system

(0) A1 : Defineing full = new(1,logical)
*(0)** **full = True*
*(0)** **.not.full = True*
(0) case A2 : full = True
(0) full = True
(0) .not.full = False
(0) case A3 : full = False
(0) full = False
(0) .not.full = True
(0) B1 : Defineing full = new(1,logical,True)
*(0)** **full = True*
*(0)** **.not.full = True*
(0) case B2 : full = True
*(0)** **full = True*
*(0)** **.not.full = True*
(0) case B3 : full = False
(0) full = False
(0) .not.full = True
(0) C1 : Defineing full = new(1,logical,False)
*(0)** **full = False*
*(0)** **.not.full = False*
(0) case C2 : full = True
(0) full = True
(0) .not.full = False
(0) case C3 : full = False
*(0)** **full = False*
*(0)** **.not.full = False*
(0) D1 : Defineing full = new(1,logical)
*(0)** **full = True*
*(0)** **.not.full = True*
(0) case D2 : full = True
(0) full = True
(0) .not.full = False
(0) case D3 : full = False
(0) full = False
(0) .not.full = True

-- 
*Gibies George,   CSIR-RF,
Climate and Global Modelling Division,
Indian Institute of Tropical Meteorology,
Dr. Homi Bhabha Road,
NCL (P. O.), Pashan,
Pune 411008, India.*
*http://sites.google.com/site/gibiesge/*
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