but you have to have beans with corn, neither one alone has all the proteins that the human body can not produce. Only meat has all of them. But by mixing veggies you can get them all.
if you mix them correctly
This is why most vegetarians will eat fish and dairy products ... they don't want to do the research necessary to design a healthy diet based entirely on vegetables.
@V2Blast When vegetarianism started, they often had poor diets and low energy which was fixed by eating meat, so most cheated. This was caused by the movement not researching dietary needs.
One of the problems with "vegan" is that it's used interchangeably to describe a dietary choice, or the same dietary choice but specifying a particular ethical justification for the choice.
@ravery I know folks who became vegetarian in the 70s, and many segments of the vegetarian community were obsessed with nutritional research--unfortunately a lot of the research was flat-out wrong.