Which of the following statements is falsifiable?

To determine which statement is falsifiable, one must understand that a statement is considered falsifiable if it is possible to conceive an observation or experiment that could prove it false.

The statement "The moon is made of cheese" can be tested through various methods, such as lunar samples collected during the Apollo missions or orbital observations made by spacecraft. These methods have conclusively shown that the moon is not composed of cheese, hence this statement is falsifiable because it can be tested and proven wrong.

In contrast, expressing a subjective opinion, such as beauty in "Purple is the most beautiful color," does not lend itself to testing or observation in a way that would allow it to be proven false; it reflects personal preference rather than an empirically testable claim. Similarly, "All planets have moons" could be disproven if an example of a planet without moons is found, but as of current knowledge, all observed planets do have moons, making that statement somewhat vague and dependent on future discoveries.

On the other hand, the claim "The earth is flat" is also falsifiable, as there are numerous ways to demonstrate the Earth's roundness through satellite images or gravity measurements. However, the intended answer of "The moon is made of cheese" stands