The words **"deem," "believe,"** and **"think"** are often used interchangeably, but they carry subtle differences in meaning. Let's explore when each of these words is appropriately used:

1. **Believe**:

- **Definition**: To accept something as true or real without requiring proof or evidence.

- **Usage**: People use "believe" to express personal conviction or faith in the existence or truth of something. It reflects a mental state influenced by personal experiences, cultural background, and social conditioning.

- **Example Sentences**:

- "I **believe** that honesty is the best policy."

- "She **believes** that hard work leads to success."

2. **Deem**:

- **Definition**: To judge or consider something in a particular way based on available information or evidence.

- **Usage**: "Deem" involves a critical evaluation of facts and circumstances. It implies forming an opinion or assessment after weighing different options or perspectives.

- **Example Sentences**:

- "Experts **deem** the research findings reliable."

- "The committee **deemed** the proposal worthy of consideration."

3. **Think**:

- **Definition**: To express a cursory conclusion or opinion.

- **Usage**: "Think" is weaker than "believe" or "deem." It indicates a less deeply considered position.

- **Example Sentences**:

- "I **think** it might rain later."

- "She **thinks** the new policy is ineffective."

In summary:

- **"Believe"** reflects personal conviction.

- **"Deem"** involves critical judgment based on evidence.

- **"Think"** expresses a less committed opinion¹²³.

So, when someone says "deem it unreliable," they are emphasizing a careful evaluation based on available evidence, rather than merely expressing a casual opinion. 🤔

Source: Conversation with Bing, 2/9/2024

(1) Believe vs Deem: Meaning And Differences - The Content Authority. https://thecontentauthority.com/blog/believe-vs-deem.

(2) What is the difference between "deem" and "think" ? "deem" vs "think .... https://hinative.com/questions/2829.

(3) Are there any differences between "I believe" vs "I think" vs "I reckon"?. https://english.stackexchange.com/questions/1070/are-there-any-differences-between-i-believe-vs-i-think-vs-i-reckon.

(4) Better word for 'believe' or 'think' - English Language & Usage Stack .... https://english.stackexchange.com/questions/261322/better-word-for-believe-or-think.