The part of the sentence "could not be accepted" is correct and usable in written English.
You can use it in a variety of contexts. For example: "The proposal was rejected because it could not be accepted."
Such extreme terms could not be accepted.
"This could not be accepted by Sharon," said Mr. Sheetrit, who mediated the dispute in recent days.
It said that the case could not be accepted unless the student could submit an uncensored version for comparison.
Spain's prime minister, José Luis Rodriguez Zapatero, insisted that an "anti-democratic coup could not be accepted" nor any "reversal of democracy in Honduras".
It was unclear whether Iran had agreed to all the conditions set out or had inserted new conditions that could not be accepted.
Meanwhile, anti-drone campaigners said if data collected by German authorities was used to target people using drones, it could "not be accepted".
In the same conversation, my mom wondered how Americans could not be accepting of African Americans when we elected a black president.
"There would be no loan until I was accepted, and I couldn't be accepted without the loan," she said.
The insurance company wouldn't authorize an admission until my patient had been accepted to a bed, but he couldn't be accepted until he'd been medically cleared.
"Many of us fled relatives and hometowns because life couldn't be accepted in a pre-decided manner but had to be discovered," Mr. Harnack wrote in The Times after attending his uncle's funeral in 1982.
The politician, Horst Seehofer, the premier of Bavaria, had told Focus magazine that immigrants who could not integrate should not be accepted.
