Question

Write the following statements in the symbolic form.
(i) Some birds can not fly
(ii) Nothing is correct

Answer 1

~b 
(~  is used for 'not'/negation) 

We take b for the statement - Some birds can fly. So, symbolically ~b  denotes that some birds can't fly.

~c 

Similarly, in the second sentence -  Things are correct is taken as symbol c and negating c, i.e. ~c  would imply nothing is correct.