▶ Your Answer :
In the lecture, the speaker contends that the claim suggested in the reading is not convincing. What this means is that the causes of the phenomenon known as 'will-o', in which eerie glowing lights seem to hover over marshes are not viable. This casts doubt on the reading passage's point that there are plausible explanations for why the phenomenon happended.
To begin with, the lecturer asserts that it is unlikely that chemical reactions contribute to what 'will-o' occurred. She points out that a certain experiment showed that rotting organic materials produced green gases, but the glowing lights of the phenomenon have yellow and white colors. This is in direct opposition to the reading's argument that the phenomenon is caused by the chemical reactions.
On top of that, the speaker argues that it is unreasonable that flying insects are the reason for the mysterious light. To more specific, the flying insects dwell in a large areas, not small marshes, so it is difficult to detect the flying insects in the marshes. In addition, the flying insects radiate blinkly, but the mysterious light don't blink. This is contradictory to the reading passage's assertion that the mysterious light is the result of the flying insects.
Lastly, the lecturer maintains that it is doubtful that the anomalous lights result from barn owls. She supports her idea by saying that the barn owls' plumage is not entirely white , so it is hard to see the mysterious glow caused by the plumage. Plus, there are no other sources to make the plumage glow at night. This rebuffs the reading's insistence that the barn owls result in the anomalous lights.
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