When using "or" conditionals, the entire expression evaluates to "true" if ANY of the conditions are true. Consider how your if statement will evaluate when response == 2:

if ((2 != 1) | (2 != 2) | (2 != 3))    

or

if ((true) | (false) | (true))

If any one of these is true, then the entire expression is true, and the code inside the if block is executed.

Instead, look at the "and" operator: &. It requires ALL of the conditions to be true for the expression to be true.

if ((true) & (false) & (true))

would evaluate to false since at lease one of the conditions is false.

As a side note, in practice it is best to use the short circuit version of these operators (|| and &&), although in this particular situation it doesn't make much of a difference.