Everything about The Indicative Conditional totally explained
The
indicative conditional is the logical operation given by statements of the form "If A then B" in ordinary English (or similar natural languages). The indicative conditional, unlike the
material conditional, doesn't have a stipulated definition. The philosophical literature on this operation is broad, and no clear consensus has been reached.
Discrepancies between the material conditional and the indicative conditional
The material conditional doesn't always function in accordance with everyday if-then reasoning. Therefore there are drawbacks with using the material conditional to represent if-then statements.
One problem is that the material conditional allows implications to be true even when the antecedent is irrelevant to the consequent. For example, it's commonly accepted that the sun is made of gas, on one hand, and that 3 is a prime number, on the other. The standard definition of implication allows us to conclude that, since the sun is made of gas, 3 is a prime number. This is arguably synonymous to the following: the sun's being made of gas makes 3 be a prime number. Many people intuitively think that this is false, because the sun and the number three simply have nothing to do with one another. Logicians have tried to address this concern by developing alternative logics, for example,
relevant logic.
For a related problem, see
vacuous truth.
Another issue is that the material conditional isn't designed to deal with
counterfactuals and other cases that people often find in if-then reasoning. This has inspired people to develop
modal logic.
A further problem is that the material conditional is such that P AND ¬P → Q, regardless of what Q is taken to mean. That is, a contradiction implies that absolutely everything is true. Logicians concerned with this have tried to develop
paraconsistent logics.
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