The phrase "left to conclude" is grammatically correct and can be used in written English.
It is typically used to indicate that something is still open for interpretation or understanding, and the conclusion must be reached by the reader or listener. It can be used in both formal and informal writing. Example: "After analyzing all the evidence, it is clear that the suspect is guilty. However, the motive behind the crime is still left to conclude."
In a "nightmarish world," we are left to conclude, "people who are broken have several selves".
Next time, the reader was left to conclude, the job would be wrapped up even faster.
We are left to conclude that these were the wrong people in the wrong jobs at the wrong time.
Huang is left to conclude, vaguely, that "the fictional Chan was part of the Zeitgeist of America in the 1920s".
There are barely another 10 negotiating days left to conclude a binding agreement in Paris by December".
A visitor from Mars would be left to conclude that we are in the midst of an unprecedented boom.
All that's left to do is to conclude with a summary of your main arguments that allows you transition easily into the main body of your proposal.
Two points on the globe below the satellite, with mirror angles and equal distances from the satellite, left investigators to conclude the jet had sent its final satellite ping in the probable corridors to the north or south.
This left Darwin to conclude that earthworms, despite their "little brains," seem to be intelligent.
Finally, Hamas' inability to challenge Israel militarily now and in the future has finally sunk in, leaving it to conclude that the only viable option left is joining Fatah in a bid to ease the financial pressure, enjoy, over time, greater political acceptance by the international community, and become an integral part of the peace process.
Frankly, if they fail to vote to stop the tax credits cuts, their words of concern will ring hollow, leaving people to conclude that they are putting party loyalty ahead of the finances of low and middle paid families.
