That isn't emotional manipulation. It is what would get called "good communication" or maybe even "empathy" on a slow day. If someone is talking to a salesperson it can't reasonably be seen as manipulation when they explain why said person should buy the thing. That is the point of the conversation.

How do you obtain objective facts about a product?

If I buy a washing machine, it has a fixed known volume, weight capacity, power consumption, noise level. These are objective facts, no? Do you think we can have different opinions on how many kilos of clothes it can take, and be both right?

They would come from the manufacturer manual or a spec sheet or something like that.

Windows has some objective, known, minimum hardware requirements. Are they open to interpretation?

What kind of products are you buying that make you wonder how to get objective facts about them?

I have feeling that this is quite an oversimplification. OS like Windows is times and times more complex than washing machine.

I don't think that it makes any sense to choose OS by minimum requirements.

It was just an example. Did you expect me to list all possible objective facts about windows in a HN comment?

Here is another objective fact about Windows: https://news.ycombinator.com/item?id=41818815

Your feelings however seem to be good arguments?