This could be false. We know that all horror stories that are about monstrous beasts describe violations of the laws of nature; maybe stories with monstrous beasts of other genres don’t describe violations of nature.

This could be false. We only know about horror stories that describe a violation of nature, not all stories that do so.

This could be false. We don’t know that horror stories “of any kind” usually describe characters’ psychological disturbance; we just know that horror stories about monstrous beasts sometimes describe psychological disturbance.

This could be false. We don’t have any indication that authors have antiscientific views; some authors may just believe that science alone isn’t enough to guide human endeavor.

This must be true. Whether a horror story is about a scientist or a beast, it describes a violation in the laws of nature. Some horror stories about beasts use symbolism, so there is overlap between stories that use symbolism and those about violations of natural laws.