The phrase "uncontrolled environment" refers to a situation or place where there is no regulation or supervision, leading to potential chaos or unpredictability. Full definition
Water fasting can be extremely dangerous in uncontrolled environments without doctor's approval. (nutritionfacts.org)
Water fasting can be extremely dangerous in uncontrolled environments without doctors approval. (nutritionfacts.org)
You are collecting these data in an uncontrolled environment (who knows, for example just how each person's computer is rendering each font, how large the font is, is it on an iPad or iPhone, laptop or desktop), are their kids breaking furniture in the background, etc.. (fastcodesign.com)