Question 766230


a  b  a->~b                                                      

T  T   {{{F}}}                          
T  F   {{{T}}}                          
F  T   {{{T }}}                           
F  F   {{{T}}}   
F  F   ?....this one is repeating,it is same as previous one

a  b  b->~a
T  T   {{{F}}}                          
T  F   {{{T}}}                          
F  T   {{{T}}}                             
F  F   {{{T}}}  
F  F   ?

so, they are equivalent