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Obverse vs Converse - What's the difference?

obverse | converse |

In lang=en terms the difference between obverse and converse

is that obverse is the double negative of a statement e.g. All men are mortal => No man is immortalconverse is of a proposition or theorem of the form: given that "If A is true, then B is true", then "If B is true, then A is true."
equivalently: given that "All Xs are Ys", then "All Ys are Xs".

As adjectives the difference between obverse and converse

is that obverse is turned or facing toward the observer while converse is opposite; reversed in order or relation; reciprocal.

As nouns the difference between obverse and converse

is that obverse is the heads side of a coin, or the side of a medal or badge that has the principal design while converse is (noun_discourse) Familiar discourse; free interchange of thoughts or views; conversation; chat.

As a verb converse is

to talk; to engage in conversation.

obverse

English

Adjective

(-)
  • Turned or facing toward the observer.
    • The obverse side of the gravestone has the inscription.
  • Corresponding; complementary.
    • When you speak clearly, people understand you. If you don't mumble, the obverse effect is observed.
  • (botany) Having the base, or end next to the attachment, narrower than the top.
    • an obverse leaf

    Synonyms

    * (turned toward the observer ): facing, presenting * (corresponding ): analogous, like, parallel, reciprocal

    Noun

    (en noun)
  • The heads side of a coin, or the side of a medal or badge that has the principal design.
    • The medal had a cross on the obverse and had a name inscribed on the reverse.
  • (logic) The double negative of a statement e.g. All men are mortal'' => ''No man is immortal

    • Antonyms

    * reverse

    Anagrams

    * *

    converse

    English

    Etymology 1

    From (etyl)

    Verb

    (convers)
  • (formal) To talk; to engage in conversation.
  • * Shakespeare
    • Companions / That do converse and waste the time together.
  • * Dryden
    • We had conversed so often on that subject.
  • To keep company; to hold intimate intercourse; to commune; followed by with .
  • * Thomson
    • To seek the distant hills, and there converse / With nature.
  • * Sir Walter Scott
    • Conversing with the world, we use the world's fashions.
  • * Wordsworth
    • But to converse with heaven — This is not easy.
  • (obsolete) To have knowledge of (a thing), from long intercourse or study.
  • * John Locke
    • according as the objects they converse with afford greater or less variety
    Derived terms
    * conversation

    Noun

    (en noun)
  • Familiar discourse; free interchange of thoughts or views; conversation; chat.
  • * 1728 , (Edward Young), Love of Fame, the Universal Passion , Satire V, On Women, lines 44-46:
    • Twice ere the sun descends, with zeal inspir'd, / From the vain converse of the world retir'd, / She reads the psalms and chapters for the day [...].
  • * 1919 , (Saki), ‘The Disappearance of Crispina Umerleigh’, The Toys of Peace'', Penguin 2000 (''Complete Short Stories ), p. 405:
    • In a first-class carriage of a train speeding Balkanward across the flat, green Hungarian plain, two Britons sat in friendly, fitful converse .

    Etymology 2

    From (etyl)

    Adjective

    (-)
  • Opposite; reversed in order or relation; reciprocal.
    • a converse proposition

    Noun

    (en noun)
  • The opposite or reverse.
  • (logic) Of a proposition or theorem of the form: given that "If A is true, then B is true", then "If B is true, then A is true."''
    equivalently: ''given that "All Xs are Ys", then "All Ys are Xs"     .
    • All trees are plants, but the converse , that all plants are trees, is not true.
    Derived terms
    * conversely

    Anagrams

    * * English heteronyms ----