[NoPie]

It's actually quite clever from the part of the scientist.

The incentive would be money, maybe the pay for doing this test was not good enough.

Or maybe the scientist was motivated by thirst of discovering something good for humanity like cure for cancer and didn't want to get distracted by other things. Funding is also needed but angel bones are clearly impossibility. Why even spend time on disproving that? But if she had engaged in discussion with people clearly believing in this nonsense it would have taken too much time. Saying, the tests are inconclusive lets her be distanced from all this and allow people to leave her alone, mostly that the groups will continue their disputes among themselves.