1 a : an assumption or concession made for the sake of argument b : an interpretation of a practical situation or condition taken as the ground for action
2 : a tentative assumption made in order to draw out and test its logical or empirical consequences
3 : the antecedent
As the US has been observed doing similar things in the past, this is a perfectly valid hypothesis.
How might one test this?
Wait 50 years for the docs to declassify perhaps.
The US has not been observed doing similar things to your ridiculous narrative in the past.
(Also, if others have speculated, you intend to refer to Israel, their arms were homegrown, not imported, their main technology partner was France, and while by the very end of the program they were on better terms with the US, through much of the time that you conjecture this conspiracy was happening US-Israel relations weren’t great – see, e.g., the Suez Crisis – so it really doesn’t make all that much sense.)
Their nuclear tech was NOT home grown.
Israel hadn’t even crossed my mind.