Don't argue with someone who pours cold water on you

When you come up with a personal opinion, don't try to persuade the cold water throwers to admit that they are wrong. This is because, first of all, they may not be wrong. Most likely, after you have tried your suggested solution, the only result is that you have done your best, and the problem is still unsolved. Second, it's a waste of time. You know, the tough people who pour cold water usually have some basis and are convinced that there is no way to do it, so it is very difficult for them to admit their mistakes. In the end, the discussion between them is just a "I'm right, you're wrong" argument. In this way, any positive effect of your original views will eventually be lost. Besides, it is still unknown whether your own method is feasible, but the other party "does know" that it is not. In such a debate, it is obvious which side is more persuasive.

Therefore, the countermeasure you should take is to put forward some flexible methods that are worth trying, even if the point of view that the pungent and intractable people think is not feasible may be correct, instead of directly arguing.