When ideas are not logically consistent or do not carry through arguments we call them fallacies. Science uses logic as one means of evaluating theory. We use it to evaluate each others arguments. In the social world it is the source of much manipulation. Deductive Arguments obtain when premisses must lead to a logical conclusion.
Inductive arguments obtain when premisses are statistically likely to lead to a logical conclusion.
The idea is to make cogent statements. This means all its premises must be warrented or true. A cogent argument must also have logical consistency. A cogent argument must also not eliminate or hold back information. Name calling, an attack on the person, TV political attack ads, shock jocks, kids on the playground.