Answer
When two cases are joined by disjunction ‘or’ then three conditions arise:
Condition 1: First case happens but not the second.
Condition 2: Second case happens but not the first.
Condition 3: Both conditions happen.
Work Step by Step
Based on the statement told by the friend that he has plans to visit Paris or London, conditions that arises are:
Condition 1: He visits Paris but not London.
Condition 2: He visits London but not Paris.
Condition 3: He visits both Paris and London.
Because disjunction ‘or’ is used here.
Now, if he visits Paris and London is not visited, then condition 1 can be concluded i.e., ‘He visits Paris but not London’.
Further, if he visits Paris and London might be visited, then condition 3 can be concluded i.e., ‘He visits Paris and London both’.
Moreover, if he does not visit Paris then condition 2 can be concluded i.e., ‘He visits London but not Paris’.
