'then arguably' is a correct and usable phrase in written English.
You can use it when you want to introduce an opinion or argument that is open to debate. For example, "It is often argued that digital technology has had a positive effect on modern communication, then arguably, it has also created a disconnect between people who instead of meeting in person often opt to communicate via text message or email."
In the early eighties, he went into business with George Soros, then arguably the world's most successful investor.
It is, then, arguably an open question what standard the Alabama Supreme Court would apply today to the determine the admissibility of expert, scientific testimony.
In the time since then, arguably Britain's greatest woman artist has been claimed both by her native Yorkshire and her adoptive Cornwall.
If Citigroup's clients, all of them sophisticated institutional investors, were foolish or careless enough to buy what Citigroup sold them, then arguably they deserved their losses.
If the Israeli boarding of the ship was illegal, then arguably the passengers were entitled to act in self-defence against the invading commandos.
The right-left balance was worse in 2003, but events since then arguably give this result greater weight: thus yesterday's gloom among Palestinians and in the Arab world.
"If an occupant is not recognized as a lawful successor, then arguably a survivor's rights to remain in an apartment become significantly murkier".
If cloning for stem cell research violates the respect the embryo is due, then, arguably, so do in vitro fertilization procedures that create and discard excess embryos.
If a peer institution has a higher placement rate over time and across discipline, and does not limit grade inflation, then arguably the present policy could hurt the future applicant pool.
"Generally, the plan documents control, and if the plan documents clearly say the rebate is not a plan asset, then arguably the employer may take the position you don't allocate any portion to the employees," Mr. Bodron said.
