The conclusion is supposed to follow from the premises . It is usually indicated by a connective 'therefore', 'thus', 'hence', etc. The premises and conclusions of arguments can be true or false, justified or not, but never valid or invalid, sound or unsound. The conclusion of a valid argument follows from the premises of this argument. An argument is invalid iff it is not valid.
All Ts wear sombreros.
Thus, BD wears a sombrero. Hence, Lulu quacks. Therefore, Stefan is at least one inch tall. Caesar was a woman. Therefore, Socrates is mortal.