We communicate using symbols. Most of these symbols are called words, and words can be represented as sounds or as combinations of letters. In addition, there are graphical symbols and even objects can be used to symbolize things.
Communication involves a number of steps. The person who wants to communicate must first have a thought. This thought must be translated into symbols. The symbols must be conveyed. The other person then needs to perceive the symbols, then translate them into thoughts.
Things can go wrong at every step of the process. You might not think of the right word. You might not spell it correctly or pronounce it properly. The other person might not hear you, or might not read the word properly, and then they might not translate it into thought in the same way that you meant it.
The way we develop vocabularies is that we repeat words over and over in similar contexts. So we say someone is running when they are wearing jogging clothes and shoes and are moving rapidly on their feet. We also say it when they are at the race track or in other racing situations.
We say it when we run. Or when others run, and gradually we work up confidence that when we use this symbol, it is referring to that set of possible actions.
We do this with the ten thousand words we have in ordinary vocabulary, and up to forty thousand words that some people have. Obviously, the more words you use, the greater the chance that someone else is going to be unfamiliar with a word you use, and have to use context to suss it out. They are more likely to get it wrong. However, the greater a vocabulary you have, the more interesting things you can say, because you can be more precise in your meaning.
All this is to say that there is only speaking and interpreting. That’s what understanding is. And of course people can and do understand each other because we are all pretty good at this process.
Are there mistakes? Absolutely! But communication is also about redundancy. We say things over and over in a variety of ways in order to reduce mistakes. A lot of our conversation is about redundancy. It would be interesting to study how much is needed in order to make sure we are clear enough for ordinary conversation.
We have developed some languages that require no redundancy. They are designed to be extremely precise. Every symbol is defined very clearly. Math is one such language.
Other languages are meant to be fuzzy, because there is usefulness to fuzziness and lack of clarity. Many times we need a lack of clarity for good social relationships. And at other times, we need more precision.
But the system works very well. We can understand each other as precisely or as loosely as we want. I think that when we are younger, we probably don’t understand this as well, and many young people hunger for more precision. As we grow older, I think we learn that imprecision can be a big friend. It’s really good for politics and international relations. It prevents many wars. It allows both sides to hear what they want to hear.
Interpretation is what communication is about, and I would argue that that is what understanding is. There is no one to one precise correspondence between thoughts in one person and thoughts in the next person. There is always fuzziness and this is a good thing.