keynotes

WEAK

basic idea basis center core cornerstone criterion crux gist heart idea kernel linchpin mainspring marrow measure motive nub pith principle root source spring standard substance

STRONG

basis center core cornerstone criterion crux essence gist heart idea kernel keystone linchpin mainspring marrow measure motive nub pith principle root source spring standard substance

WEAK

basic idea

STRONG

end exterior exteriority outside periphery result surface