Overcome the presumption 英翻中

Can somebody help please? How would you translate the following:

..fail to overcome the presumption of...Many thanks!
更新: Thanks for the excellent reply. But I think it's a little off than what I'm looking for. I should of had the whole sentence:

You failed to overcome the presumption of immigrant intent.

This was told by an U.S. Custom officer to a visitor at the airport.

Please help and thanks again!
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