non-verbal and verbal comms

This post is likely to be edited over time..
conventional wisdom is that 75-80% of comms is non-verbal, while it can be overestimate it holds some truth from the speakers point of view.
however since very rare people are trained into like deception detection analysts or otherwise exposed to behavioural analysis area etc they are likely to interprete non-verbal communication wrongly - like crossing arms, what if i feel comfortable - due we being individuals the person interpreting my message needs to understand my background, how signs mean for me, my personalitype etc, so without knowing these it actually can increase misinterpretation - or rather alternate understanding, disorientation, so limiting extra comms(and assumptions based on gender, race age etc when seeing face to face) helps to go for more universal understanding - thoughts on brain are interpreted by voice/signs done by speaker due no direct brain impulse based comm exist yet.