Why terms are necessary for communication.?
I know that we used terms to explain things better.

And sometimes we used this to hide what we really meant to say...

We think more in story form than in the litterary sense (word for word), 'terms' paint a stroy for the mind to absorb or distort quickly, just as in memory we do not think in terms of conversation, unless in loves reminisces (remisses) and even then there is back drop in volved.
So I would say it is just like any easily accesible thought, it is short storries for the mind to take guage the picture not always just scripture. And all good God Scripture tells a story while doing so telling, reminding leaving as referential record.

I agree. Terms can be a short-hand way of conveying an idea, but I also think terms have inherent ambiguity which allow for mutual consensus even when there isn't any. For example, the term Free Markets, or democracy. We can rally around these terms without really agreeing on what they are so that we can move forward with disagreement.

Rich

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I know what "free market" and "democracy" mean. And if you don't, you can look them up. Of course, they are not exact enough for extended and accurate discussion, but they are enough to get started. As the conversation goes on, they will become more precise, or they will be dropped in favor of more precise language. As Aristotle pointed out, an educated man does not expect more precision than the term can deliver.