> Your example does not work with the article because the simplistic approach is already proven to be an ok design.

Where is it done? No where in the article the author said "Chet said it will not work in 3 week, so I demonstrated that it will work in 3 weeks". The author just __assume__ it is an ok design.

What I'm telling you is that you and the author are acting in a way that shut down the conversation in case you are right AND in case you wrong.

Your answer to that is "I'm mentally impossible to conceive a scenario where the author missed something, did not realise the 'simple-one-axle-mounting' approach will fail". That is such a red flag.

> The complex approach (maybe a non standard suspension) is for an hypothetical scenario that Chet believes will occur in 3 weeks.

This is not what I ask you. I ask you to say what Chet should say in the situation where Chet is right, where the author design is incorrect and Chet scenario is not hypothetical. You keep twisting back "no but let's just pretend it cannot happen". This is my worry: are you even able to conceive that it can happen?

> That means the solution is OK and the implementation will provide some value for the customer.

What? That is definitively not how normal people would understand this sentence. Are you a native english speaker? According to you "I could do this simplistic thing now but it would not work" is an impossible sentence? Or that this sentence is saying that the solution is OK because the sentence contains "I could do this thing"?

> How does he know that?

Well, that's the point. In this step of this dialog, you don't know yet, and yet you already concluded that Chet does not know and that you know.

> Where's the argument, not merely examples as in the rest of the dialogue, but real objective facts and numbers

Chet is introducing the problem, he is shut down before he can even give his first example. Chet may have plenty of objective facts and numbers, but the author shut down the conversation before it even happen. In this dialog, Chet is __trying__ to bring facts and numbers, starting by a concrete illustration, but he is interrupted before he can do it.

You are so full of it. You are saying "Chet did not arrive and slap the author with a book full of facts, so it is the proof that Chet has no idea of what he is talking about and should be shut down before he can prove this assumption is wrong".

> Will we really need it?

You don't know if you really need it or not, you don't know if Chet has facts and numbers. Because YAGNI is shit, you just assumed that the situation is over-engineer, while you have no idea of what the situation is and stop people who try to explain it to you.

> We know that we don't need it today.

No you don't. You just stop Chet explaining and interrupt him.

> What will change in a few week that will make it a requirement? Again what needed here is objective facts. Not what-if scenarios.

This is what I saying from the start: when Chet reacts like that, the fact that the author does not say "wait a minute, do you have objective facts" is a red flag. The fact that the author goes to the what-if scenario that his design will obviously work, without providing any objective facts, is the problem.

> Why the rush?

Where is there any rush. The situation is extremely simple. The guy say: "hear me you, I think I will be wasting me time doing this". The author answers "shut up" and __assume__ that Chet has no argument.

> That's all the questions I would have asked if I was not familiar with the project. But if you're the project lead, the only thing that would have led you to question yourself is if Chet has said the simplistic approach does not work. But it does.

I saw very experienced devs failing at that all the time. In this article, the author is assuming he has a good understanding of the project and shut down anyone who can bring important information.

Your approach: "I'm the lead, so I cannot be wrong, so I assume Chet is incorrect when he said the simplistic approach will not work" is so bad. Do you even realise that?

You are a perfect example of what I was talking about. What would you have lost in just hearing Chet out? But now, YAGNI is just shit, it pushes people to have this attitude to assume that only them know the truth.