Assumptions are hypothetical explanations of the universal regularity and causality of unknowns based on known scientific principles and certain facts. Which of the following are not hypothetical. ['AIDS is caused by Mycoplasma and HIV.', "e world's gradual warming is due to atmospheric factors, or ocean factors, or factors inside the earth.", '"Declaration of Death" in C Civil Law.', 's a "universal solution" that can dissolve everything.']