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Even more broadly, one's view of logic depends on one's view of the world, and of whether things beyond man are "real," and to what extent. Four views on the subject have been current at various times in human history:

Even more broadly, one's view of logic depends on one's view of the world, and of whether things beyond man are "real," and to what extent. Four views on the subject have been current at various times in human history:

* [[Objectivism]], or logical objectivism, states that reality is what it is, and the principles of logic are what they are, independent of any person's perception of them or efforts (or lack of effort) to understand them.

* [[Logical objectivism]] (closely akin to Randian [[Objectivism]] but not identical to it) states that reality is what it is, and the principles of logic are what they are, independent of any person's perception of them or efforts (or lack of effort) to understand them.

* [[Subjectivism]], or logical subjectivism, states that what we call the "laws of nature" are merely our attempts to understand nature, and are not fundamental properties ''of'' nature.

* [[Logical subjectivism]] states that what we call the "laws of nature" are merely our attempts to understand nature, and are not fundamental properties ''of'' nature.

* [[Logical positivism]] states that human beings know only that which they directly perceive and register in their minds.

* [[Logical positivism]] states that human beings know only that which they directly perceive and register in their minds.

* [[Solipsism]] holds that nothing is provably real except the fundamental facility of human consciousness--in other words, nothing that a human being sees need be real.

* [[Solipsism]] holds that nothing is provably real except the fundamental facility of human consciousness--in other words, nothing that a human being sees need be real.