No. The omniscient being under discussion is atemporal. The phrase, "Then a choice which occurs in the future," cannot apply.
Change the sentences to read:
"An omniscient being knows everything from the first moment anything can be known by the omniscient being. Then a choice which occurs at any time may be the source of some of that knowledge."
Would you prefer I use "at any time" in every occurrence of every word that indicates tense?
I have explained before the use of tenses for convenience. Let's not demonstrate such a basic lack of comprehension again.
There is no "then". It always was/is/will be. So to suggest something happens/happened "then" is a stupid argument.
Since, it is a fact that "then" has multiple meanings, one of which is to be a logical connective, and since it is obvious, at an elementary level, that that is the meaning in this sentence, your point is less than trivial.
Oh, and it's dishonest to define a hypothetical being having certain characteristics, then to argue one way or another about that being by changing those characteristics. Didn't you learn anything by watching how badly AvalonXQ failed using dishonesty as a strategy?
The only characteristic I have given is all-knowing. I have provided additional analysis, which has not been addressed (I presume out of fear of failure).
Maybe you can offer a reasonable analysis to refute this:
On Wednesday the 6th I choose to drink a root beer.
On Monday the 4th the omniscient being knows I choose to drink a root beer on the 6th because, in fact, I do choose to drink a root beer on the 6th.
On Friday the 8th the omniscient being knows I choose to drink a root beer on the 6th because, in fact, I do choose to drink a root beer on the 6th.
This example shows a choice and knowledge of that choice in a non-chronological order.
Nothing in this example is contrary to the common definition of omniscience.
Nothing in this example indicates that free will is precluded by omniscience.
Therefore, there is no incompatibility between omniscience and free will.
This simple scenario demonstrates an exception to the frequent argument that if god knows it before it happens, then it must happen that way in the future.
So, don't trot out that waste of a reason again.