 Observation of the vapor tracks made by charged particles in a cloud chamber is a favorite example used to illustrate theory-laden observation. A scientist could not observe, say, a positron, if the scientist did not already believe various theories, e.g., regarding sub atomic particles and how such particles will affect the medium in the cloud chamber when they pass through it. But this does not mean that experienced scientists make a theory-neutral observation of what happens in a cloud chamber and then draw inferences regarding the sub atomic particles from their theories and the theory-neutral observation. That might have been what scientists had to do early on in the development of the cloud chamber and the relevant theories. But now when experienced scientists watch what happens in a cloud chamber, they will spontaneously and non-inferentially form beliefs about positrons, muons and the like; such spontaneous beliefs are real observations. Experienced scientists make such observations in just the way an ordinary person might observe a dog or cat in the front yard.