Not dumb. That explanation exemplifies the point that you could not and CANNOT argue.
@Genez
Okay, just not to leave any stone unturned, and for conscience's sake, I'll try this one more time.
But It's kind of ironic that I explain to you the implications of what you believe, but okay, whatever.
Remember, I'm talking about what you think is true, not what I think is true.
Your belief is that when someone comes to believe in Christ, by that, they also became saved; that is, they became saved solely due to their believing in Him. Belief is binary. It doesn't happen in stages - one either believes that something is true or they don't - and should that change, they would go directly from one to the other. So, if someone came to believe in Christ, by that, and at the exact instant of believing (not later), they immediately became saved since believing itself causes salvation (again, your doctrine, not mine).
Therefore, given that believing alone saves someone (according to you), then there cannot be any time lag or separation between that believing and saving - both must occur simultaneously because, again, becoming saved is solely a function of believing, and if someone believes, then they must immediately receive salvation too. If believing and salvation didn't occur simultaneously, then logically speaking, there would be some factor outside of believing at play which actually causes/controls salvation. So then, with the "shall be saved" (future tense) in the verse you chose, the "saved" part cannot mean "saved" as you intend it but must represent something other than that, otherwise, the two (belief and salvation), would be separated in time and a logical impossibility. Therefore, for the verse to mean what you say it means, the two tenses would need to be the same, not different. Notice that the "shall be saved" in your verse is the same "shall be saved" tense-wise as stated below in
Romans 5:9 and is representative of the same thing. In the verse, the "being
NOW justified by his blood (Aorist), we
SHALL BE SAVED (future tense) from wrath through him", that they are justified, and by that justification, would later be saved from God's wrath (future tense) with His ultimate wrath to be dispensed at the end of time. So, the "saved" which is in view means to be saved from that wrath, not to be given salvation. After all, the ultimate end of the gospel, is either to be saved from God's wrath or to suffer it, with everything else leading up to those ends.
The point of all of this is to demonstrate that Scripture uses the word "saved" in different contexts, and with different intents/meanings, not always of becoming saved. IOW, it can mean to become saved, or to literally be saved. I hope you can understand this distinction.
As I mentioned to you in a previous post, the phrase "shall be saved" is contained within many NT biblical verses. You should therefore consider that it is to be saved from God's wrath for the reasons stated above.
[
Rom 5:9 KJV] 9 Much more then,
being NOW justified by his blood, we
SHALL BE SAVED FROM WRATH through him.
Notice below that Scripture identifies actually becoming saved as "are saved" when it occurs at a particular moment and not in the future, in contrast to, and different than "shall be saved", so it does make clear a distinction in usages, with that distinction validating my interpretation of "shall be saved".
[
Eph 2:5 KJV] 5 Even when we were dead in sins, hath quickened us together with Christ, (by grace
ye are saved)
[
1Co 15:2 KJV] 2 By which also ye
are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
I think you therefore place salvation on the wrong side of belief - that salvation should correctly be understood as coming before belief, not after it.