Study logic

logic

there are common rules of logic. we cant doubt logic, if we use logic in certification

   1  true & false
   2  true theory's reason = true theory
   3  certification = logical tie
   4  true theory's logical tie = circle shape
   5  common truth ≠ uncertain information in public

read next

   1  and, or, in our certification 
   2  all theory, connect together, with logical tie