SOBERANO, Rubicon.
 A critique of Professor Acuna's Philosophical Investigation of two-valued deductive logic.
<strong>Philippine Social Sciences Review</strong>, [S.l.], jan. 2012.
ISSN 2672-3158.
Available at: &lt;<a href="https://journals.upd.edu.ph/index.php/pssr/article/view/2722" target="_new">https://journals.upd.edu.ph/index.php/pssr/article/view/2722</a>&gt;. Date accessed: 06 sep. 2025.