I'm thinking.... about the Matrix,
You can see it, hear it, feel it, eat and taste it, so is it real?

Now, let's say everything is predetermined. So you get up in the morning because it's already predetermined, then you get hungry because of it's predetermined you'll feel hungry at exactly 7:15AM this morning, and you choose to eat roti canai cause you happen to fancy so today, but little did you know it's actually predetermined you'll choose it... so...

Well I believe in knowledge above all else, so I believe there's an explanation for everything. Thus unless there's a matrix like entity, free will is simply what I'll side with.