Curriculum › Grade 12 › English Language Arts

Evaluating Reasoning in Seminal Texts

  • Grade 12
  • English Language Arts
  • RI.11-12.8
  • Reading: Informational
  • Free lesson

Aligned to RI.11-12.8 — Common Core State Standards for English Language Arts.

What this lesson teaches

Foundational public texts argue through premises, principles, and legal reasoning. Delineate the chain — what is assumed, what is claimed, what follows — and evaluate whether the conclusion truly rests on the premises or leans on an unstated assumption.

Worked examples

Example 1

A charter argues that because all members consented to the rules, any member who breaks them forfeits protection; the reasoning is only as strong as its hidden premise that everyone genuinely consented, so a reader who questions whether newcomers ever agreed has found the joint on which the whole argument turns.

Example 2

A treaty argues that because both parties signed freely, both are bound. The reasoning depends on a premise about what counts as freely — and the historical record shows one party signed with an occupying army present. The logic is valid; the argument fails at the premise, which is where most arguments in seminal texts actually fail.

Example 3

Common mistake: confusing a valid argument with a sound one. An argument is VALID if the conclusion follows from the premises, and SOUND only if it is also valid AND the premises are true. All contracts are freely entered, this is a contract, therefore this was freely entered is perfectly valid and worthless. When you evaluate, say which you are challenging: the logic or the premises.

Practice questions

  1. Restate the premises and conclusion of a foundational argument in your own words.
  2. Identify any assumption the argument needs but does not state.
  3. Evaluate whether the conclusion follows, and name the weakest link in the reasoning.

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En español

Evaluar el Razonamiento en Textos Fundacionales

Los textos públicos fundacionales argumentan mediante premisas, principios y razonamiento legal. Delinea la cadena — qué se supone, qué se afirma, qué se sigue — y evalúa si la conclusión de veras descansa en las premisas o se apoya en una suposición no dicha.

Ejemplo 1: Una carta constitutiva argumenta que, como todos los miembros consintieron las reglas, quien las rompe pierde su protección; el razonamiento vale tanto como su premisa oculta de que todos consintieron de verdad, así que un lector que duda si los recién llegados alguna vez aceptaron ha hallado la bisagra de todo el argumento.

Ejemplo 2: Un tratado sostiene que, como ambas partes firmaron libremente, ambas quedan obligadas. El razonamiento depende de una premisa sobre qué cuenta como libremente — y el registro histórico muestra que una parte firmó con un ejército de ocupación presente. La lógica es válida; el argumento falla en la premisa, que es donde fallan de verdad casi todos los argumentos de los textos fundacionales.

Ejemplo 3: Error común: confundir un argumento válido con uno sólido. Un argumento es VÁLIDO si la conclusión se sigue de las premisas, y SÓLIDO solo si además es válido Y sus premisas son verdaderas. Todos los contratos se firman libremente, esto es un contrato, luego se firmó libremente es perfectamente válido y no vale nada. Al evaluar, di qué estás cuestionando: la lógica o las premisas.

More Reading: Informational lessons

Integrating and Evaluating Multiple SourcesRI.11-12.7Citing Evidence in Argument and ReportRI.11-12.1Two Central Ideas and Their InteractionRI.11-12.2How Ideas and Events Interact Over TimeRI.11-12.3Technical and Figurative Meaning in NonfictionRI.11-12.4Evaluating the Structure of an ArgumentRI.11-12.5

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