a, b, c: BOOLEAN;

%% QUERY (a XOR b) <=> (NOT a AND b) OR (NOT b AND a);

%% QUERY NOT c AND b;

QUERY (IF c THEN a ELSE b ENDIF) <=> ((c AND a) OR (NOT c AND b));

%% QUERY (a => b) <=> (NOT a OR b);

%% QUERY TRUE XOR FALSE;