DISCUSSION: This question tests two things:
- Do you remember that the left-to-right explanation is discussed only in the first paragraph.
- Can you reread the first paragraph and retain the details long enough to spot the right answer?
Don’t make this question more complicated than it needs to be. The right answer is directly in the paragraph. The wrong answers are calculated to confuse you. It should only take about 15 seconds to reread the first paragraph – rereading is far faster than reading the first time.
(left-to-right reversal is part of the field-of-sight explanation, in the first paragraph)
- Front-to-back is the alternate explanation, it is described in paragraphs 2-4. This questions asks about the left-to-right explanation, which is only mentioned in paragraph 1.
- CORRECT. Lines 10-12 say this.
- Lines 7-10 say that mirrors images depend on the position of the observer, but the position of the object isn’t mentioned. Size makes no sense: small objects reverse, and big objects don’t? You know from experience that size doesn’t affect whether a mirror image reverses.
- There are no two-dimensional objects. There are two dimensional images, but not objects. If you ever come across a perfectly two-dimensional object, call a mathematician.
- Lines 28-31 mention mental constructs. These are only mentioned to explain why the front-to-back theory is persuasive. Mental constructs have nothing to do with the first paragraph and the field-of-sight theory.
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