Final answer:
Occam's razor implies the simplest explanation for feeling sick after eating leftovers is likely a foodborne illness, rather than a virus, due to the direct correlation between eating the food and onset of symptoms.
Step-by-step explanation:
According to Occam's razor, a principle that suggests the simplest explanation is usually the correct one, if you feel sick after eating leftovers from the refrigerator, the most straightforward hypothesis is that you may be suffering from a foodborne illness. This illness could be the result of bacteria, viruses, or parasites that may have been present in the leftovers. If food is not stored properly or refrigerated promptly, it provides an environment for harmful pathogens to multiply and produce toxins, which can lead to symptoms such as vomiting, stomachache, and diarrhea.
By examining this situation under the lens of the digestive system health, it's clear that the probable cause of the illness is related to the ingestion of contaminated food, rather than a stomach virus, which would require contact with an infected individual or contaminated surfaces. When considering options like a virus or a contaminated food source, given the direct correlation between consuming the leftovers and feeling unwell, Occam's razor favors the simpler connection, which is foodborne illness from the leftovers.