You’re smarter than your dad.
You’re right, it is in no way shape or form evident that time has a begining.
What we’re getting into here goes beyond time itself into the realm of causality. When you’re talking about causes, you’re talking about temporal possibilities.
Ok, so I’m not “pedantic” glares at Dark Meathead, I’ll put it simple…
If everything within reason has a begining, where did God begin?
Is God able not to have a begining?
Does this mean God does not obey the laws of reason?
Is God still perfect if he doesnt obey his own laws?
What if time has no begining, but goes on ad infinitum? It’s possible…
What if you, instead, think of time as a biiiig giant spiral shape that is moving along a z-axis of causality. (whoa…ok, let me draw a picture).
Now, I’m just illustrating an alternative view that is reasonable in order for the sake of showing that it is not evident that time and causality are one-in-the-same (as your father would like to imply), but instead, separate spaces that are interelated. Much like spacetime!
Ok, so, consider the spiral above (sorry for my art skills). The spiral represents our shared timeline (it should be in polar space, but I’ll use euclidian for the time). The space that the spiral is in (the x,y,z space you see above), that’s kinda like causality. That spiral is our particular timeline.
What are spirals? They are sorta like circles that curve back around each other, right? So, a spiral has a circular component AND a linear component. The challenge now is to look at time as being linear only in appearance. So it seems like time goes in a straight line from point in time A to point in time B, no arc, no curve, just straight. However, what we know from quantum mechanics says very…VERY differently. Time is relative in Quantum Mechanics (the most accurate portrayal of the universe known so far), which means that time is dependent on the observer.
Consider your father’s perspective. He’s going to work at, let’s say, a space station that takes 4 years to travel to at 3/5th the speed of light. Ok, so he speeds off, and gets to the space station. During this these 4 years, there’s an 80% time dialation for your father. What does this mean? When he leaves a year later (5 years have passed for him, remember), he’ll take another 4 years to get home, so 9 years have passed since you’ve seen your father, right? Wrong. Because of the time dialation, your father wont see you for 9 years, but you wont see your father for 11 years!!! Sound weird? That’s quantum mechanics. I got my data from this site ( mentock.home.mindspring.com/twins.htm ) 'cause I’m lazy and didnt want to do any math.
Now, of course it would be an infinite regress for time to go on and on forever, but (and I dont have the art skills to make this picture, so use your imagination) what if you think of time like this… you start at Y= 1… you go up Z one unit, and you curve right back around to Y = 1 again. What if Y=1 is our initial time reference? In other words, y=1 would be the begining of OUR time… but what happens as you curve back around the spiral to y=1 again? You reach the end of our time and the begining of another time reference.
What does this mean? The casuality that we see through time may, in fact, not at all be interconnected to time.
Ok, so… in layman’s terms. Time does not need a “cause”. Time merely needs to curve and exist. Causality is where time exists, space and causality make time curve.
Ug, maybe it’s not as easy as I thought to explain.
Again, this is just one theory. But some, like the famous time traveler John Titor make the claim that we can travel into the past by moving into similar temporal realities that are, technically, in the future.
The question now is, what caused causation (if that makes sense). Well, M-Theory speculates that it would be caused by the collision of two other universes, resulting in energy being placed in this one. What causes that? Damned if I know… wouldn’t it be a kicker if that kinda stuff was caused by simple actions/reactions in everyday life? You know, like punch a wall and you cause a whole 'nother universe to spawn in a dimension that we cannot see. Oh the world of physics… crazy stuff.
It’s weird stuff. Just tell ask your father if he believes everything a salesman has ever told him. Then ask him why he believes himself when he tries to sell the world to himself at face value.
R.I.P. Douglas Adams