Passage Summary: Scientists expected to find a neutron star after a massive 1987 supernova because that's what the rules of physics say should happen. However, even with our best technology, we haven't seen the signals a neutron star would send out, so the rule might be wrong.

Conclusion: The theory that supernovas of a specific size always result in the creation of neutron stars is likely incorrect.

Reasoning: Despite using highly sensitive equipment to search for the radiation pulses characteristic of neutron stars, no such evidence was found following the 1987 supernova.

Analysis: The argument relies on the idea that if we can't find something with our best tools, it probably isn't there. To strengthen this, we need to eliminate other reasons for the 'missing' star. Look for an answer that confirms our instruments were definitely looking in the right place or that there wasn't anything like a space dust cloud blocking the signal. If we can prove the search was thorough and unobstructed, the conclusion that the star doesn't exist becomes much stronger.