Affirming the consequent[edit]
Main article: Affirming the consequent
Any argument that takes the following form is a non sequitur:
- If A is true, then B is true.
- B is true.
- Therefore, A is true.
Even if the premise and conclusion are both true, the conclusion is not a necessary consequence of the premise. This sort of non sequitur is also called affirming the consequent.
An example of affirming the consequent would be:
- If an idea is true (A), then it must be crazy. (B)
- An idea is crazy. (B)
- Therefore, the idea is true. (A)
It is not the logical-mathematical path that leads to discoveries in physics, but the philosophical-metaphysical path, the play of crazy imagination.
Read, for example, about the “Einstein arc” or E. Schrödinger:
“...Metaphysics is not part of the building of science itself, but is rather like wooden scaffolding, which cannot be dispensed with when constructing the building. Perhaps it is even permissible to say: metaphysics turns into physics in the process of development...”