Final answer:
The absence of empirical evidence and alternative explanations involving natural processes suggest that theories such as the existence of God, fairies, or space monkeys are not likely to be real.
Step-by-step explanation:
The inability to disprove the existence of certain theories does not inherently make them possible. In order to determine the possibility of something, evidence must be considered. The absence of empirical evidence for theories such as the existence of God, fairies, or space monkeys suggests that they are not likely to be real. Additionally, alternative explanations involving natural processes can account for phenomena that may be attributed to these theories.