lol I love this too.
No offense, I don't want to bash the OP. just tell the truth.
Also, there's no audio-relate.
WindowsX you know why people don't believe what you say or even call you a troll.
1. your language is very offensive.
Being the non-native speakers is not a good excuse here, too. (Your English is fine.) You always keep blaming others who haven't agree with you "stupid", "lack of experience", "using budget stuff", etc.
2. lack of info.
You state you can hear up to 25kHz without proof. Also, you sum up thing based on your no-proof statement. In contrast, others argue with the documents, scientific reports, etc.
Your only claim is the test that is very vague to measure. First two questions came to my mind, "is that test reliable?" and "how could he know that file have the exact freq range?"
From this point, I didn't disagree with your statement, but just want to have a clarification and confirmation.
Also, your statement still have some flaws such as the confusion of sampling rate and freq range. It shows you lack of info, too.
It's like you go to the bank and look for the investment for your business, but you don't have business plan or have a very weak one - no reliable source and have an obvious flaw. I bet you won't get any investment unless your family.
3. You is what you say.
You always say people who don't believe you is full of ignorance. However, you deny to proof you are correct. That's very easy to prove just make an appointment to the audiologist, and post your test here. Also, you keeps avoiding what others ask.
That's what people call "ignorance."
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What makes the argument strong is the scientific info. such as the research and the theory. What makes the arguments weak is the feeling and personal experience. Sometimes, personal experiences cause the mental problem so-called learning disability. (Learning Disability, Senge)
All in all, it's just about your point of view. It's art or science.
Sometimes people say audiophile are both art and science.
If it's science, you need to confirm it's right or wrong by your concrete statement.
If it's art, there's no right or wrong because it depends on personal point of view.
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Hope this help.