The white concave-sided diamond (⟡) has the informative alias “never (modal operator)”. I would have expected it to mean the opposite because U+25C7 (◇, white diamond) is used for possibility rather than impossibility. Two sources that support my view:
https://books.google.com/books?id=41VYDwAAQBAJ&pg=PA211 https://www.mdpi.com/2079-9292/8/10/1163 The informative alias of U+27E2 and that of U+27E3 might also need to be corrected. Best regards Ivan
