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Or of question ambiguity. If the word exists on many layers, and they're not sure which one you're asking about, they might get stuck there. I notice that I mostly agree with your questions (a 'statistic' and 'money' are both fairly crisp ideas that have a clear use in their respective fields, and so even just pointing at what they're used for is a decent definition), but that bramflake's suggestions all seem problematic.
"Money" is a vague idea. It's defined as something that can be traded for goods and services, but everything can be. It's just a question of how quickly, reliably, and consistently it can be done. Out of necessity, economists have given precise definitions of "money". At least six of them.