Since the other link concerning "free will" was mainly from the perspective of psychology and brain science, here's another from philosophy which just from the entry statements has shown me in the past why I typically avoid the phrase "free will" unless I define it narrowly in an attempt to state what the actual choice is that we want to discuss.
Free Will (Stanford Encyclopedia of Philosophy)
So, to the OP, "can we really exercise free will?":
- Please define "free will"
- Since at least one or maybe more proposed definitions have been rejected by some, is there a definition that can be agreed upon?
- Is this a discussion of science, philosophy, or since it's posted on a Bible discussion forum, does it concern something specific within theology and if so, what is the specific question theologically?
This reminds me of another philosophical topic of discussion we've gotten very used to having based upon secular terminology. A while back for a few reasons I did some research on the word "morality" which our Text really does not use. As I recall, only Paul uses the word or a related one in Greek and only a few times and it's typically translated as "traditions" or something similar.
Yet here we are millennia later having joined into the debate with secular philosophy, assumed their language and all the baggage of the unanchored to God discussion trying to assert God into the talk.
Yet when I read God's Text, He seems quite clearly to have taken to Himself language such as righteousness and holiness, good and bad, sin, etc., which He defines in His Word while mostly setting aside the Greek philosophical reasoning and barely even using the word "moral" which stems from a word which, again as I recall, was coined by Cicero before the time of Christ and thus readily available for use when the NC was written, but God didn't use it in any way that seems that meaningful.
Moral of the story for me has been to set aside as much of this philosophical baggage as possible and just discuss Biblical things with Biblical words. It's difficult by this point, but not impossible.
What's impossible is trying to make sense of the phrase "free will" unless we define it ourselves for our purposes.