What is the difference between the meanings of "assumption" and "hypothesis" in the following context.

Feminist researchers have also developed alternatives to assumptions, research questions, and hypotheses that they criticize. [Source]

The definitions that the main dictionaries on the web [for example compare here and here] offer are all to the effect that both words mean something taken for granted without it being proved and basing other views on it.

Is there a technical difference between the meanings of these two terms?

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ODO lists among its senses

hypothesis: a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation

and AHD

assumption 4. Something taken for granted or accepted as true without proof; a supposition

The difference here is that a hypothesis involves taking the reasoned approach 'Let's assume for the time being that W is true' and going on to show that X and not-Y say follow, and Z is very likely, if the assumption was correct. An assumption need not be so grounded in the scientific method, and indeed may be little more than a prejudice, not intended to be checked out but used as if incontrovertibly true.

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