Logica Hamburgensis

work by Jung

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June 30, 2026

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The Logica Hamburgensis (1638) was a work by Joachim Jung that aimed to replace the older "Protestant" logic of Melanchthon. Its main strength was its comprehensive presentation of late medieval logical theories and techniques. Jung paid particular attention to valid arguments that didn't fit standard syllogistic forms, including quantified relational arguments, which he termed "oblique" syllogisms. He proposed a method of rewriting premises to make these arguments amenable to standard syllogistic manipulation. This work was a significant contribution to the logic of the 17th century.12

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history of logic
The 17th century
The Logica Hamburgensis (1638) of Joachim Jung (also called Jungius or Junge) was one replacement for the “Protestant” logic of Melanchthon. Its chief virtue was the care with which late medieval theories and techniques were gathered and presented. Jung devoted considerable attention to valid arguments that…
Read More
The Logica Hamburgensis (1638) of Joachim Jung (also called Jungius or Junge) was one replacement for the “Protestant” logic of Melanchthon. Its chief virtue was the care with which late medieval theories and techniques were gathered and presented. Jung devoted considerable attention to valid arguments that…
Read More