I advert to some StackExchange proposals, success of which I wish :

♦ Canada ♦ Greek ♦ Logic ♦ Literature ♦ Psychology ♦ Rhetoric ♦ UK

I may need at least 2 weeks for cogitation, but please write me any time. I always accept an answer or ask supplemental questions, and upvote accepted answers. Since comments are less readable, please write (edits to) responses only in the Answer. The following is for my reference only (arrows herefrom):

 (:Em Space)  ✘  ✓   ¿   ●   ■  « »    ←  ⟵  ⟽  ⟸    ⟶ → ⟹ ⟾   ⟷⟺

≡   ∨   (∨)   ∧   (∧)  ¬   ¶   ∃   ∀   ∴   ∵