Please do heed your own advice.
Educate yourself on these things. And try to be humble in your approach. If you dont know something, just ask. You dont have to pretend to know everything. No problem, next post also in order to prove to yourself that you are superior you can use some ad hominem to satisfy yourself.
But understand something. The phrases I used are not just Contingent and Necessary. I said "Contingent Being" and "Necessary Being". The first post you responded to I have explained it in a nutshell. But since you are here to prove you are right, you won't accept it. So I asked you to do your own research.
Modal logic is used to come to conclusions, as reasonable as can be. So is formal logic. That is not philosophy. In philosophy Contingent beings and Necessary beings have certain definitions. In Modal logic, just because the word necessary is used, no one would say that is all modal logic. Unless that person is absolutely uneducated in logic. The word necessary is used in novels, that does not mean it is only in novels. Also, the phrase is not one word, necessary. It is two words which I said several times but you want to ignore it.
It is "necessary being". Two words.
This is a whole trail of thought in philosophy. And they have specific definitions, and many systems developed by people like Kripke, and many many others. Even an entrant in philosophy knows this. Any sophomore. So if you search for something simple like "contingent being" you will come across many philosophical papers on it, and how modal logic is applied for logical explanations of contingent existence.
Something like "contingent beings" existed in philosophy since time immemorial and much recently people like Prior developed his logical systems around it. So if you see this word in a modal logic case like Priors modal logic, that does not mean the whole concept of contingent beings is only within modal logic. Way back in the 10th, 11th centuries people like al juwaini and Avicenna discussed contingency arguments and theories. Then you get Christian philosophers like Plantinga who were making a lot of thinking on the same topic. In Philosophy there is a whole stream of thought on essentialism. If you read up, you will learn something about it.
So thanks for engaging. As always, as with many, I expect one more characteristic post as response with a small insult or an ad hominem. Have a good day.