Which contractual standard for product safety and liability says that buyers chose to make purchases and therefore every purchase involves informed consent and is ethically legitimate?

The contractual standard for product safety and liability that says the buyer chose to make the purchases and knows the each purchase involves informed consent is often referred to as the standard of caveat emptor. This is simply a warning that lets the buyer know and understand the product is sold as is and is subject to all defects. Basically, another way of saying buyer be ware.