The phrase "incredulity about" is grammatically correct and commonly used in written English.
It means a state of not believing or being skeptical about something. Example: The audience expressed their incredulity about the amazing magic tricks performed by the magician.
Several music aficionados expressed incredulity about the project's very existence.
"I am sharing your sense of incredulity about that transaction".
Reuter reports, with similar incredulity, about Avellino's personal business dealings.
Above and beyond my lack of incredulity about this marathon of rain lies my actual pleasure in the phenomenon.
Jack Straw, the justice minister, said in a BBC radio interview on Tuesday that many Labour legislators had reacted to the behavior of the three ministers with "incredulity about their stupidity" for being "caught in a sting like this".
The anger comes and goes at different times, but I do feel a jaw-dropping incredulity about things - like the fact the signal man presumed the train would stop.
Phillips was reduced to screaming incredulity, just about managing to get out that Deeney had put the ball into the net, but like everyone else he was rather overcome by the moment.
But despite his apparent incredulity, the reality about daily fantasy sports is that unresolved questions about the industry matter to millions of Americans.
Darwin would surely have frowned on the suggestion that, because naturalistic explanations are rarely obvious, skepticism about science is justified (a move that has been called the argument from personal incredulity).
"It's about the incredulity that I could still be fooled into looking for a perfect moment".
His voice was tinged with incredulity when someone asked about whether the knee injury sustained by quarterback Phillip Rivers, who is listed as questionable, would impact his preparation.
