Hypothesis: meaning, definitions and examples

This is used in scientific or academic settings when proposing a possible explanation or prediction that can be tested through experimentation or observation.

• My hypothesis is that the growth rate of plants will increase with more sunlight.
• The researchers are testing their hypothesis about the effects of sleep on memory.

This is used in a more formal setting to describe a well-substantiated explanation of some aspect of the natural world that has been repeatedly tested and confirmed through observation and experimentation.

• The theory of evolution explains how species change over time.
• Even though it's just a theory, it is widely accepted in the scientific community.

This is used when talking about something that is accepted as true without proof, often as a starting point for further reasoning or action.

• The report was based on the assumption that all data was accurate.
• We made an assumption that we would have enough resources to complete the task.

This is used to denote a belief or assumption that is taken for granted or accepted as true, often with a slight implication of overconfidence or presumptuousness.

• His presumption that he would win the prize was obvious.
• There is a legal presumption of innocence until proven guilty.

When discussing a scientific or academic idea that can be tested and validated through experimentation or observation.

• The scientists formulated a hypothesis about the behavior of the new compound.
• Her hypothesis was that increased exercise leads to better sleep.

In casual conversations, when making an assumption without much evidence or when unsure about the answer.

• I would guess she's about thirty years old.
• Can you guess what I'm thinking?

When discussing ideas or theories that are based on conjecture rather than concrete evidence, often in finance or abstract subjects.

• There was a lot of speculation about the company's future after the CEO resigned.
• The media's speculation about the celebrity's personal life was rampant.

When making an opinion or conclusion based on incomplete information, often in academic or intellectual discussions.

• His conjecture about the historical event was based on limited archaeological evidence.
• The researchers made a conjecture on the possible causes of the phenomenon.