The phrase "arguably because" is correct and usable in written English.
It can be used when presenting a claim or opinion that is open to debate or interpretation, suggesting that there is a reasonable argument for the statement that follows.
Example: "The project was successful, arguably because of the team's dedication and hard work."
Alternatives: "possibly due to" or "potentially as a result of".
Arguably because - as a book inextricably tied up with apartheid - it's lost some of its political urgency.
The care-giving channel does not play a role in the long term arguably because, as Banerjee (2016) or Kim et al. (2016) show, in the long term, young children tend to recover from bad health episodes caused by pollution6.
They are doing it, arguably, because of the smartphone's glare.
Despite their guns (or, arguably, because of them), they are quite peaceable.
That didn't have much success, arguably because it was too early and the implementation wasn't great.
Arguably, a national system makes it easier to change jobs (I say arguably, because my understanding is that interfirm mobility is actually lower in Europe and Canada).
Arguably, because Europe failed to make labor market reform its cutting edge for change, Europe's experience with growth programs has been grim.
Despite attracting a voice cast that included Daniel Craig and Jonathan Pryce for the English-language version, it flopped – arguably because it favoured style over substance.
As I pointed out in the London Evening Standard last week, "this kind of repetitive wall-to-wall coverage seeps into the public consciousness" despite, and arguably because of, antagonistic headlines and comments.
I say arguably because low-wage jobs in France pay more than low-wage jobs in the U.S. Working at a low-end department store in France provides a livable level of income.
Much of what we consider American food -- Maine lobster, perhaps, excepted* -- originated there, not only because that's where the farms were but also, arguably, because that's where our greatest overeaters continue to dine.
