For those paying out of pocket, buying used can save save 25% - 50% off of purchasing the product new. Buyers can expect a product price of between $500 - $1,500 for a used stair lift. It should be emphasized that unless one is buying from professional refurbisher, this price very likely does not include installation.
Definitions for res ipsa loquitur. res ipsa loquitur(noun) a rule of evidence whereby the negligence of an alleged wrongdoer can be inferred from the fact that the accident happened.
Non sequitur (Latin for it does not follow), in formal logic, is an argument in which its conclusion does not follow from its premises. In a non sequitur, the conclusion could be either true or false, but the argument is fallacious because there is a disconnection between the premise and the conclusion. All invalid arguments are special cases of non sequitur. The term has special applicability in law, having a formal legal definition.