the.com/guesswork
The art of being confidently wrong until the data shows up.
means Work or conclusions based on guessing rather than reliable evidence or calculation.
from From guess (Middle English gessen, to estimate) plus work — literally labor performed without knowing, formalized in 1700s English to dignify the educated shrug.
Cousin termConjecture is guesswork wearing a lab coat.
Hidden costMost planning disasters start as polite guesswork.
Sweet spotHypotheses are guesswork with a plan to check.