A fallacy is the use of flawed reasoning, or "wrong movements," in the development of an argument, which may appear stronger than it is if the fallacy is not recognised.
For instance, the argument "Blue is a bad colour because it is associated with sadness," asserts a claim and provides evidence to support it. We may employ arguments that do not logically support the claim or are not logically supported themselves, regardless of whether the claim we make is true or incorrect. Someone who associates blue with calmness could find the preceding argument to be false.
Fallacies are subdivided into "formal" and "informal".
What is the precision of fallacy?
It is not completely precise. We have certain reasons which can lead to fallacy:
(a) Error in argument
(b) Reasoning error
(c) Argument on belief or concept
(d) Rhetorical techniques