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Main Point

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Carefully analyze the argument below.

In evolutionary biology, morphological convergence is typically cited as evidence that specific environmental pressures deterministically sculpt species into optimal physiological forms. However, this adaptationist paradigm severely underestimates the constraints of phylogenetic inertia. Because complex organisms possess highly integrated developmental pathways, a genetic lineage can produce only a narrowly circumscribed range of viable mutations. Consequently, morphological similarities between distinct clades frequently reflect shared developmental limitations rather than independent optimization to identical environments. It follows that the presence of analogous structures in disparate species should not be reflexively construed as proof of identical selective pressures. The fundamental architecture of an organism is dictated more strictly by its ancestral developmental blueprint than by its immediate ecological context.

Identify the ultimate main conclusion of the argument. Copy and paste the exact sentence from the passage that functions as the main point.

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Cevap: The fundamental architecture of an organism is dictated more strictly by its ancestral developmental blueprint than by its immediate ecological context.; The fundamental architecture of an organism is dictated more strictly by its ancestral developmental blueprint than by its immediate ecological context; the fundamental architecture of an organism is dictated more strictly by its ancestral developmental blueprint than by its immediate ecological context.; the fundamental architecture of an organism is dictated more strictly by its ancestral developmental blueprint than by its immediate ecological context

Cevap

The fundamental architecture of an organism is dictated more strictly by its ancestral developmental blueprint than by its immediate ecological context.
The final sentence is the ultimate conclusion because it is the broadest claim that all preceding premises and intermediate conclusions aim to establish. The author uses the limitations of genetic mutations (premise) to conclude that similarities reflect shared limitations (intermediate conclusion 1), which in turn proves analogous structures don't strictly mean identical pressures (intermediate conclusion 2). All of this serial logic ultimately supports the final, overarching claim that ancestral blueprints govern an organism's architecture more strictly than immediate ecological context.

Adım Adım Çözüm

1
Identify the primary topic and the author's stance.
The author is challenging the 'adaptationist paradigm' which claims that the environment deterministically shapes species into optimal forms.
Understanding the author's overall critical position helps distinguish the main conclusion from the opposing viewpoints introduced early in the passage.
2
Analyze the structural indicators and logical flow.
The passage uses a serial chain of reasoning. 'Because' introduces a premise about genetic mutations. 'Consequently' introduces a first intermediate conclusion. 'It follows that' introduces a second intermediate conclusion.
Tracing the flow of evidence reveals which claims support others and which claim is ultimately supported by all the preceding statements.
3
Distinguish between intermediate conclusions and the ultimate conclusion.
The claims starting with 'Consequently' and 'It follows that' are conclusions, but they are narrower in scope. They serve as logical stepping stones to prove the final, broadest claim located at the end of the paragraph.
The main conclusion must be the ultimate point that the entire argument is designed to prove, lacking any further dependent claims.

Anahtar Kavram

Distinguishing the ultimate conclusion from intermediate conclusions in a complex serial argument.
Soru 22Soru →

Epistemologist: The persistent notion that scientific consensus is achieved primarily through the accumulation of theory-neutral observational data must be discarded. It is true that historically, empiricists have championed raw observation as an independent arbiter capable of resolving disputes between conflicting theoretical frameworks. However, recent advances in cognitive psychology have decisively shown that perceptual processing is intrinsically modulated by an observer's prior conceptual commitments. Consequently, because researchers operating under distinct paradigms literally perceive different phenomena when observing the exact same event, what is recorded as 'data' is always already interpreted. It follows that the foundational evidence used to validate a theory is itself a product of that very theory.

Which one of the following most accurately expresses the main conclusion drawn in the epistemologist's argument?

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Cevap: The idea that scientific consensus relies on the accumulation of theory-neutral observational data is flawed and ought to be abandoned.

Cevap

The correct answer states that the idea of scientific consensus relying on theory-neutral observational data ought to be abandoned.
The argument's primary purpose is to reject the 'persistent notion' mentioned in the first sentence. The author introduces psychological evidence to show that data is interpreted, which leads to the intermediate conclusion that evidence is a product of theory (the final sentence). This intermediate conclusion is ultimately used to justify why the traditional notion of theory-neutral observation 'must be discarded.' Therefore, the first sentence is the main conclusion.

Adım Adım Çözüm

1
Analyze the structure of the argument to separate premises, intermediate conclusions, and the main conclusion.
The argument begins with a strong normative claim (must be discarded), concedes a historical point, introduces new evidence (cognitive psychology), draws a sub-conclusion about perception, and draws another sub-conclusion (It follows that...).
Identifying structural indicator words and the logical flow is essential to pinpointing the ultimate conclusion.
2
Evaluate the relationship between the first sentence and the final sentence.
The final sentence ('It follows that the foundational evidence...') acts as the final piece of logical support for the first sentence ('The persistent notion... must be discarded').
Arguments often place a highly visible intermediate conclusion at the end of a stimulus to distract from the actual main conclusion located at the beginning.
3
Scan the options for a paraphrase of the first sentence.
The correct option perfectly captures the meaning of the first sentence, while the most attractive distractor captures the final sentence.
The main point must encompass the author's primary claim, not just a stepping stone used to get there.

Anahtar Kavram

Identifying the main conclusion when it is structurally separated from intermediate conclusions and premises.
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Main Point Alıştırma Soruları — LSAT — Sayfa 2 | Examkin