the.com/touch and go

Uncertain enough that even optimists are quietly Googling backup plans.

means A situation so precarious or uncertain that the outcome could go either way at any moment.

from First recorded in the early 1800s, likely from coaching or sailing jargon — a carriage wheel that grazed an obstacle without crashing, or a ship's keel that brushed the seabed without running aground. Either way, the image is the same: contact made, disaster barely avoided, and nobody quite sure how. By the 19th century it had drifted ashore into general use for anything hanging precariously in the balance.

origin
ships grazing seabed without sinking, 1800s sailors
aviation sense
landing then taking off again without stopping
usage
means outcome unresolved, risk still live
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