Art Conservator: A recently unearthed landscape painting bears the signature of Clara Vane and perfectly matches her distinctive brushwork. However, chemical analysis reveals traces of cerulean blue in the sky section—a synthetic pigment not commercially available until 1860, eight years after Vane's death. Consequently, the painting cannot be an authentic work by Vane and must be a clever forgery.
Is the following statement about the argument true or false?
The conservator's argument requires the assumption that the cerulean blue pigment was not applied to an authentic Vane canvas during a subsequent restoration or modification effort.
Answer: Answer
Answer
The statement is True. The argument inherently relies on the assumption that the pigment was part of the original composition rather than a later addition.
The statement is true because it identifies a 'defender' assumption necessary for the conclusion to hold. The argument concludes the painting must be a forgery solely because it contains a pigment from 1860. By applying the Negation Test, if we assume the pigment WAS applied to an authentic Vane canvas during a later restoration, then the painting is not inherently a forgery, and the conclusion is entirely destroyed. Thus, the author must assume no such restoration occurred.
Step-by-Step Solution
Key Concept
Applying the Negation Test to identify 'Defender' assumptions that rule out alternate explanations.