Starting with a generally accepted or previously proved general statement, this approach moves toward a statement regarding a particular. A form of this approach is the syllogism, a three-part series of related statements. This form includes a major premise, a minor premise, and a conclusion drawn from the two premises. Here proper statement and definition of terms is Important. Angels are limited in time and space.
Demons are fallen angels.
Therefore demons are limited in time and space. To support a positive assertion there must be sufficient evidence. If varying types of known evidences agree and contrary statements have been properly rejected, then there is a good measure of support. The validity of the conclusion depends upon the weight of the support. We have used this type of argument regarding the reality of Satan and demons in chapter 1.