[hamdani yusuf (OP)]

Is it from another thread?

No.

Which post is it?

[hamdani yusuf (OP)]

The videos from Stanford are longer, but they also say that you haven't even described the problem yet until it's analyzed from traveling twin's perspective, let alone providing a possible solution.

[hamdani yusuf (OP)]

You are right (in short) that the explanation of the (not) paradox is that the scenario is not symmetrical, the reason for that being one observer remaining in a single frame, and the other not. *

In the scenario here, all travelling twins accelerate exactly once. They also decelerate exactly once.
The trajectories of twins B, C, and D have translational symmetry.

[pzkpfw]

That's an amazingly dishonest trimming of my post, which completely removes the point.

[hamdani yusuf (OP)]

That's an amazingly dishonest trimming of my post, which completely removes the point.

You should read the title of this thread.

[pzkpfw]

That's an amazingly dishonest trimming of my post, which completely removes the point.

You should read the title of this thread.

You should read the posts in the thread. (Including your own!)

[hamdani yusuf (OP)]

That's an amazingly dishonest trimming of my post, which completely removes the point.

You should read the title of this thread.

You should read the posts in the thread. (Including your own!)

What's the point you tried to make in your post?

[hamdani yusuf (OP)]

Here's the diagram in the perspective of stationary earth, midway, or Alpha Centauri.

The diagram was made in Power point.
The yellow square is 10x10 cm, which represent 10 years in vertical axis, and 10 light years in horizontal axis.
Red line represents light trajectory.

[hamdani yusuf (OP)]

The next diagram will describe the same events in A's perspective. It's done by rotating time, as explained in the video below.

The Twins Paradox Primer (Rotating TIME!)

[hamdani yusuf (OP)]

Here's the result.

The size of the yellow square is 9.165 cm, which represents the A's travel time in his own frame of reference, which is around 9.165 years.
Note that A meets D at the midway point at half way of his journey. A also arrive at Alpha Centauri at the same time as B.

[hamdani yusuf (OP)]

Here are the perspective of B, C, and D while they are travelling. The size of yellow squares are 3x3 cm, representing 3 years and 3 light years.

[hamdani yusuf (OP)]

Note that diagrams with rotated time preserve the Orthogonality of space-time axes of the earth and Alpha Centauri frame (see the midway arrow and dashed grey line connecting earth and Alpha Centauri). The closer the speed of travelling twin to the speed of light, the space-time axes of the stationary frame get closer to the light cone in the rotated space-time diagram.

[hamdani yusuf (OP)]

Here's the result.

The size of the yellow square is 9.165 cm, which represents the A's travel time in his own frame of reference, which is around 9.165 years.
Note that A meets D at the midway point at half way of his journey. A also arrive at Alpha Centauri at the same time as B.

According to A, both B and C switch their reference frame once, while D switchs twice. But they must have the same age, due to symmetry.
It means that each frame switch of D only produces half amount of age difference, compared to each frame switch of B or C. It also means that the age difference depends on the distance between the subject and the switching frame observer.

[hamdani yusuf (OP)]

During the launch, twin B lit up a powerful flash light going everywhere spherically. According to  B, the light will get to Alpha Centauri after twin C arrives there, but before twin D arrives there.
But according to observer on Alpha Centauri, the flash light will not be received before both C and D have arrived.

[Origin]

So have you figured out it is not really a paradox?

[hamdani yusuf (OP)]

So have you figured out it is not really a paradox?

I don't think so. Have you?
If you are referring to my latest post, then at least one of the observers must be false. Do you know which one? Why is it?

[Origin]

If you are referring to my latest post, then at least one of the observers must be false. Do you know which one? Why is it?

I'm not referring to any post in particular, I was just wondering if you have figured out that there is not really a paradox.

[hamdani yusuf (OP)]

If you are referring to my latest post, then at least one of the observers must be false. Do you know which one? Why is it?

I'm not referring to any post in particular, I was just wondering if you have figured out that there is not really a paradox.

Did you take it for a reason?
Or did you take it by faith?

[Origin]

Did you take it for a reason?
Or did you take it by faith?

You are not very good at answering questions.  I will assume you have not come to the conclusion that there is no real paradox. 

[hamdani yusuf (OP)]

Did you take it for a reason?
Or did you take it by faith?

You are not very good at answering questions.  I will assume you have not come to the conclusion that there is no real paradox. 

You're too good at answering questions. You already knew the answer even before the question was properly described yet.
Unfortunately, you can't explain how you got that answer.