The phrase "under false pretences" simply means by lying and deceiving. It was first used in a legal context in England in the time of Henry VIII when it was made a crime to obtain property from...
It's possible, yes. In most US jurisdictions, a contract is voidable if it was signed under either duress or due to fraudulent statements made by the other party.
Yes...well at least in America...not sure about other countries.
Yes, that is true but then this brings up other legal matters, like obtaining goods by false pretenses is a crime under common law,...