Definition

Noun: A fundamental premise or supposition that serves as the essential foundation for an argument, theory, or line of reasoning. It is a starting point that is accepted as true without immediate proof within the context of that argument.

Usage

The term "basic assumption" is used to identify the core, often unstated, beliefs that underpin logical reasoning or a theoretical framework. It is typically presented early in an argument to establish common ground.

Examples

• The economist's entire model rests on the basic assumption that consumers act rationally.
• Before we can debate the policy, we must agree on the basic assumptions about human nature.
• One basic assumption of the scientific method is that the universe operates according to consistent laws.

Advanced Usage

• To challenge/question a basic assumption: To critically examine the foundational premise of an argument.
  • The new research challenges a basic assumption of classical physics.
• Underlying basic assumption: Emphasizes that the assumption is fundamental and often implicit.
  • The proposal's flaw lies in its underlying basic assumption about unlimited resources.

Variants and Related Words

• Assumption (n): A thing that is accepted as true or as certain to happen, without proof. "Basic assumption" is a specific type of assumption.
• Premise (n): A previous statement or proposition from which another is inferred or follows as a conclusion. Often used interchangeably with "basic assumption" in logic.
• Postulate (n): A thing suggested or assumed as true as the basis for reasoning, discussion, or belief. Similar to a basic assumption, especially in mathematics and philosophy.
• Axiom (n): A statement or proposition which is regarded as being established, accepted, or self-evidently true. This is a very strong type of basic assumption, especially in formal systems.

Synonyms

• Foundational premise
• Core supposition
• Fundamental postulate
• Underlying principle

Related Phrases

• Take something as a basic assumption: To accept a proposition as the starting point for discussion.
  • For this exercise, let's take as a basic assumption that time travel is possible.

Noun

1. an assumption that is basic to an argument