The first cause argument is simply a logical premise by premise argument.
P1: Every being that has a beginning has a cause for its beginning.
P2: The universe has a beginning.
C : Thus its "possesses" a cause for its beginning.
Others have already pointed out the fallacies here. You assume things not known to be true. Both P1 and P2 are unshared premises, which is why your argument is called valid, but not sound.
How about changing it to a conditional syllogism? Now, soundness doesn't enter in, just validity:
P1: If every being that has a beginning has a cause for its beginning,
P2: And the universe is a being and has a beginning,
C : Then the universe has a cause for its beginning.
I don't see how that can be wrong.
So can you prove it untrue?
First, I don't need to. I didn't claim that anything was untrue, just unproven and not a shared premise for many.
You, on the other hand, do make that claim. Can you prove it true?
Second, you're not doing your part here. You posted a syllogism. I responded to it specifically, telling you exactly where I disagreed and why. That what dialectic looks like - the cooperative effort to resolve differences in opinion by tow or more people well versed in critical thinking. These people a have a common method of deciding what is true about the world, and can go back to their point of departure and discuss why they took different paths from there. If they share the same ability to interpret evidence with fallacy-free reasoning, they can reach a resolution. One taches, one learns.
That just doesn't happen here, does it? This discussion is already over. It ended when you chose not to tell me whether you liked the rebuttal argument, or if not, exactly what fact or inference you disagreed with and why - as I did. Now you've moved on to another sub-thread where you want me to prove what I didn't claim. What do you imagine is in this for the other person when you do that?
Do contingent beings not have a cause? Please prove it if you dont mind.
I do mind, as I just explained. Please do your part and rebut my rebuttal. It's not all about you and what you want to discuss. If you aren't listening to others, you're preaching, not discussing.
Besides, the arguments against P1 and P2 have been given by multiple other posters here, and you haven't addressed any of them in the sense of acknowledging that read and understood what was written, and if you disagree, where and according to what evidence or argument. People have told you that what applies to objects in the universe doesn't necessarily apply to the universe as a whole? Why don't you feel a responsibility to either say that you agree, or if not, specifically why. We're right where we began in this thread, with you expressing your opinions, failing to rebut others' rebuttals, and repeating yourself that you think you have a good argument there. You don't, and since you don't want to discuss why others think so, the discussion is over.
I just went through this with somebody whose OP was a criticism of evolution. I answered by referring to specific claims in the argument, and telling him why I disagreed. He then mentioned his god (he's Christian), and I told him what I'm telling you here: He made an argument, I rebutted it, and he drifted off with more of his opinions, which were now resembling preaching and nothing to do with evolution, his claims about it, or my rebuttal to his claims. I even pointed out where he had failed to respond to my rebuttal, asked him to do so, and he ignored that as well. Did he even read it? If so, do my questions and comments not matter to him, only his?
So I told him that he wasn't listening, only preaching, that I wasn't interested in discussing his theology with him, that he appeared to be uninterested in discussing what was of interest to me (it was a bait and switch, pretend to care about an imagined crisis in the science only to switch right away to God talk), and that the discussion was over, adios. His reaction was to frame my response as running away. I guess I can't argue with that, although I felt like I was walking.
So, anyway, this is just to let you know that I am always ready to engage in a good faith discussion with you or anybody else, but you need to be paying attention to what you are told and have the respect to address it with a reasoned rebuttal.
Here's what I am saying in graphic form. I don't like this formulation completely, but I won't go into why here, except to say that there is good faith disputation that lives near the top of this triangle, and the bad faith disputation that isn't interested in this in the least, just preaching and often trolling (lowest levels)
I am asking you to be in the upper triangle her, and telling you that for those who can't or won't do so, there is no dialectic, and thus no progress possible. Once I see that, I lose interest in continuing as I have here. Now it's me lecturing, since I don't expect a responsive reply, just more playing in the lowest levels of this hierarchy of debate, which have no value to me. So, let's play by academic standards (dialectic), or not at all: