What I want to achieve is this:

When DATE+365 is less than OTHERDATE AND it is equal to YETANOTHER DATE THEN 'Correct'

Right now my code looks like this:

(CASE WHEN ((X2.TERMDATE + 365) < X1.LASTHIRE) IS (X1.ORIGINALHIRE) THEN 'Correct' 

WHEN ((X2.TERMDATE + 365) < X1.LASTHIRE) IS (X3.LASTHIRE) THEN 'Correct' 

WHEN ((X2.TERMDATE + 365) > X1.LASTHIRE) IS (X1.LASTHIRE) THEN 'Correct' 

ELSE 'ERROR' END)

Is this possible? Where am I going wrong?