If completeness is defined by theory and chemical tests then that statement could be correct, but if one see form the point of what the body absorbs in terms o

If completeness is defined by theory and chemical tests then that statement could be correct, but if one see form the point of what the body absorbs in terms of nutrition, that would be almost totally incorrect. Animal proteins almost always are better digestible and have less substances that irritant your gut. Plant proteins often need the right processing ( cooking, grinding, soaking etc.) to make them digestible and generally have substances that will irritate your gut. Consequently one of the most unsaid/undetected problems that vegans face is protein deficiency. All this can be can be empirically observed. It can be a red herring when people start talking about amino acids, 'studies' etc.