From the episode:
"RIKER: Data? Data, are you all right?
DATA: Yes, sir.
RIKER: What happened?
DATA: I got angry. "
Without his positronic brain being able to identify and create at least some rudimentary emotions, Data wouldn't be able to recognize anger at all.
"RIKER: Data? Data, are you all right?
DATA: Yes, sir.
RIKER: What happened?
DATA: I got angry. "
Without his positronic brain being able to identify and create at least some rudimentary emotions, Data wouldn't be able to recognize anger at all.