List of top Language and Linguistics Questions on Logical Operation

Based on the statements in (1) – (4), which option/s is/are correct?  
(1)   Thor has a female sibling                             
(2)   Thor has a sister
(3)   Thor has visited New Delhi
(4)   Thor has visited India

In the following truth table, what does X stand for? 


 

The given sentence is ungrammatical because:
Tailan believes that himself is smarter than Po
Given the rules P and Q, what is the name of the rule ordering in dialect X and Y?