I've seen it happen dozens of times in my testing workflows. You give an LLM a complex set of dimensions—a wall, the area of two windows, the surface roughness, and the number of coats needed—and you ask for the paint volume. The model starts strong. It identifies the variables correctly. Then, somewhere between calculating the subtraction of the window areas and applying the texture multiplier, it hallucinates a decimal point or loses track of one of the subtractions. LLMs are incredible at ...