Anne brought a 1 l bottle of vinegar from home to use in an experiment on volcanoes in science class. she poured the contents of the bottle into a large beaker and carefully measured it. she was surprised to find that the vinegar's measured volume was actually 1.02 l. anne thought the bottle contained exactly 1 l of vinegar. what possible explanation can you think of for the difference?
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Maybe it is the difference between the accuracy of the measuerment method. And every measurement method will have the error. So there will be different result when using different measurement method.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

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