The phrase "almost certainly operating" is correct and usable in written English.
It can be used when expressing a high degree of confidence about something being in operation or functioning, but with a slight uncertainty.
Example: "The system is almost certainly operating at full capacity, given the recent updates and maintenance."
Alternatives: "likely functioning" or "probably in operation."
Surgeons with a significantly higher 'negative appendix' rate are likely operating too frequently, and those with rates approaching zero are almost certainly not operating on enough patients.
However, as we shall see in Section 2, hierarchical modulation also imposes a second performance penalty, namely, for a given choice of hierarchial constellation, and fixed target bit error rates of the two streams, the system will almost certainly be operating at a higher overall SNR than is needed to satisfy the target BERs.
"They are certainly operating almost as a unit," said Evan Tracey, chief operating officer of T.N.S.M.I./Campaign Media Analysis Group, which monitors political advertising.
These measures would almost certainly raise the operating costs of coal plants and thus make nuclear power more competitive.
These measures would almost certainly raise the operating costs of coal plants, making nuclear power more competitive.
Fundamental changes in the way California elects its leaders — a top-two primary system aimed at pushing candidates to the ideological center and an impartial redrawing of the state's political boundaries — will almost certainly change how Sacramento operates for years to come.
The tax experts consulted by The Times said the $916 million net operating loss declared by Mr. Trump in 1995 almost certainly included large net operating losses carried forward from the early 1990s, when most of Mr. Trump's key holdings were hemorrhaging money.
Flame's targets were almost certainly a handful of computers operating sensitive aspects of nuclear programs in the Middle East.
As happened in 2011, the Treasury Department, through creative cash management, could almost certainly keep the government operating for two or three additional months beyond that date, which would take us to mid-August.
