Final answer:
The claim that WIMPs are made of protons and neutrons is false; they are proposed as a non-baryonic form of matter, different from familiar baryonic matter like protons and neutrons.
Step-by-step explanation:
The statement that WIMPs, or weakly interacting massive particles, are probably made of protons and neutrons is false. WIMPs are hypothetical particles that are one of the prime candidates for dark matter's composition. WIMPs are not made of protons and neutrons, but rather they would be a new, non-baryonic form of matter, distinct from the familiar particles that make up the atoms in our own bodies and the visible universe. Protons and neutrons are examples of baryonic matter, meaning they are composed of quarks and participate in strong nuclear interactions. WIMPs, on the other hand, would only interact via the weak nuclear force and gravity, making them very difficult to detect. They could potentially be much more massive than nucleons (protons and neutrons) or could be similar in concept to neutralinos or axions, which are other hypothetical particles suggested as dark matter components.