Until recently it was thought that ink used before the sixteenth century did not contain titanium. However, a new typ...

GreenMachine June 4, 2015

Perspective

In abstract terms, answer A states that the author's argument contain premises (new analysis' findings) that undermine it's conclusion, correct?

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Naz June 5, 2015

Well, sure in the most abstract terms this is true - but, that is also true for every correct Errors in Reasoning question.

What's happening is that one piece of evidence is being used in two contradictory ways.

For a more detailed explanation, take a look at the previous thread.

Hope that helps! Please let us know if you have any other questions.