Membership in any community affects individual thinking in two ways: it teaches one what to think, and it teaches one how to think.
We are taught what to think by all the ways in which the community signals to us which ideas are in favor and which are not. Signaling may be very overt (”How dare you say that!?”) or less so, as when one’s statements are based on assumptions the group doesn’t share, and are consistently met with non-understanding. In many persons, these signals result in various thoughts being either “thinkable” or “unthinkable” in the context of the group.
We are taught how to think when we are taught explicit paradigms for thinking (”Here is a model for thinking; find ways to apply it.”), or rules, which are even more explicit and which normally come packaged with statements of the conditions under which they apply (”When both A and B occur, do C.”) All formal rules of logic are obviously teachings as to how to think.
These two teachings, what to think and how, interact with each other and are interdependent. Some of what we may or can think is actually decided by what we learn about how to think. When we have been taught rules for thinking, they inform what we are able to think in that, using a given set of rules, certain thoughts can be thought and others cannot.
This is true and obvious in language: in English, which makes no distinction between polite/formal and familiar/informal forms of address, there is no way precisely to translate the insult conveyed when a Frenchman addresses a social peer or superior as tu on their first meeting. Similarly, when a framework for how to think has been put in place, it makes certain thoughts truly and literally unthinkable, while other thoughts will come rather naturally, proceeding almost inevitably from the framework of rules.
Conversely, we infer part of the how from the what. Even when rules are not taught us explicitly, we learn them by inference, based on what we observe to be permissible. Again, this is true and obvious in our learning of language: most of us have no conscious knowledge of syntax or grammar, never having heard their rules stated explicitly. Yet we know these things quite well, learning them by example and by inference. Those individuals who are able to make explicit what is implicit may originate an explication of the rules they obey in speaking and writing, and we might say these people are self-taught in grammar.
This would be wrong, however. Rather, they are only expressing in words what they have certainly been taught in another way, the same way all others are taught.
There is also a kind of middle ground between what we learn about what and how to think. This is the case when we are taught rubrics for judging thoughts based on outcomes. Some groups are quite explicit, for example, in applying a pleasure principle: only think “positive” thoughts, or those which make you feel good. This may lead to highly stilted and unrealistic thinking. But closely related rubrics may be very healthy, such as when alcoholics in recovery learn to eschew thoughts that would lead them to drink.
Since some thoughts are made easy or hard, near-inevitable or near-impossible, by one’s group membership, any group which must think must be aware that its very existence as a group will tend to advance certain kinds of thinking and thwart others. Groups as groups will never be aware of these group-engendered influences on their thinking, but depend on their constituent members to recognize them. The individual thinker within a community that must think should be aware of the effects of group membership on individual and corporate thought processes. I will explain some of these effects in the next chapters.