полагать vs предполагать

polagat vs predpolagat — consider/assume vs suppose/assume

What it really means

Полагать is a formal or literary verb meaning consider, believe, or deem, often presenting a reasoned opinion. Предполагать means suppose, assume, or hypothesize, and leaves the proposition explicitly uncertain. Both are imperfective and can take an accusative clause; полагать is also common in fixed formal phrases such as полагать необходимым.

Examples in natural speech

Я полагаю этот вывод ошибочным.
I consider this conclusion mistaken.
Мы полагаем, что переговоры продолжатся.
We believe that the negotiations will continue.
Предполагаю, что поезд задержится.
I suppose the train will be delayed.
Учёные предполагают наличие связи.
Scientists hypothesize that a connection exists.
Комиссия полагает необходимым провести проверку.
The commission considers it necessary to conduct an inspection.

Common mistakes

Do not use полагать in casual speech merely to translate every “suppose”; считать or думать may be more natural. Предполагать signals a hypothesis, not a firm conclusion, and the pattern полагать кого/что каким is not interchangeable with предполагать кого.

Memory tip

Полагать weighs and judges; предполагать leaves a possibility open.

Frequently asked questions

Does полагать sound formal?

Yes, especially in first-person statements; я полагаю is polished and can sound official, while я думаю is ordinary conversation.

What construction follows предполагать?

It commonly takes что-clause or an accusative noun phrase: предполагать, что он придёт; предполагать ошибку.

Can полагать mean “lay”?

The verb полагать has older or specialized senses, but in modern expression contrasts its formal “believe/consider” use with предполагать.

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