  Arbitrariness attributed to the zero point constant of the $V$ band
bolometric corrections ($BC_V$) and its relation to "bolometric magnitude of a
star ought to be brighter than its visual magnitude" and "bolometric
corrections must always be negative" was investigated. The falsehood of the
second assertion became noticeable to us after IAU 2015 General Assembly
Resolution B2, where the zero point constant of bolometric magnitude scale was
decided to have a definite value $C_{Bol}(W)= 71.197~425~...$~. Since the zero
point constant of the $BC_V$ scale could be written as $C_2=C_{Bol}-C_V$, where
$C_V$ is the zero point constant of the visual magnitudes in the basic
definition $BC_V=M_{Bol}-M_V=m_{bol}-m_V$, and $C_{Bol}>C_V$, the zero point
constant ($C_2$) of the $BC_V$ scale cannot be arbitrary anymore; rather, it
must be a definite positive number obtained from the two definite positive
numbers. The two conditions $C_2>0$ and $0<BC_V<C_2$ are also sufficient for
$L_V<L$, a similar case to negative $BC_V$ numbers, which means that
"bolometric corrections are not always negative". In sum it becomes apparent
that the first assertion is misleading causing one to understand bolometric
corrections must always be negative, which is not necessarily true.
