1. Natural deduction introduction and elimination rules for modal quantifiers

  2. Is there a deduction analog to the problem of induction?

  3. Does Pascal's Wager contain any logical flaws or fallacies?

  4. Are there degrees of truth ?

  5. Is Euclid's syllogistic approach to proving mathematical theorems logically insufficient?

  6. why is it impossible to predict or foresee the future but if can what is the closest method to do so

  7. Why did we define vacuous statements as true rather than false?
  8. Logical equivalence

  9. What is behind Girard's idea of distinguishing implication ( ⇒) and entailment (⊢) without separating language and meta-language?

  10. Is this a correct symbolic formulation of the idea that one symbol can't mean two different things (in one system)?
  11. Is saying "There would be no rich without the poor" a false dichotomy?
  12. Does anyone know of a philosophy which rectifies or considers the following question?

  13. formal logic, fitch exercise

  14. how to prove from ~ (A ∩ B) that ~A∩~B?

  15. Write down a sentence that is a contradiction if and only if the argument ‘X, therefore Y’ is valid
  16. Does the imperfection of man imply the imperfection of God?

  17. Ad baculum fallacy: is there a distinction between a direct threat and an appeal to an external one?

  18. The Truth-Falsehood Dichotomy and Logic

  19. Logical fallacy: when you know the outcome, so you cannot see any other possible ex ante prediction

  20. How can I explain the distribution of an O proposition's predicate?
  21. Is there anyone who believe that all modal statements are meaningless or trivial?

  22. Aristotles Categories

  23. Getting started with reading papers in (philosophical) logic

  24. List of Logic Symbols

  25. Can 2 logical deductions starting from 2 different and independent sets of assumptions lead to 2 contradictory conclusions?

  26. Semantic Values of Sentences

  27. Where in the evolutionary chain did morality start to evolve?
  28. How many valid categorical syllogisms are there?

  29. Do α and β entail each other?
  30. Apart from clarification, what are some uses of formal logic in philosophy?
  31. What is the fallacy in comparing evolution to a fairy tale?

  32. Why contradictions imply anything

  33. Does transposition of the premises preserve validity in categorical syllogisms?

  34. can we reason about logic?
  35. Quantificational Logic Question (Determining Truth-Values)

  36. Necessary or Sufficient

  37. Question on instantiation
  38. Is it certain that aliens exist in an infinite universe?

  39. Reduced model of society
  40. What is an appropriate way to solve a Mill's method table, if it exists?

  41. Logic and reason is circular reasoning..?

  42. need help translating the following sentence to first order logic with identity and functions

  43. How fundamental is logic?
  44. Is there a logical symbol for "why"?

  45. Mathematical Logic by Elliott Mendelson

  46. Is religion fundamentally problematic for logical decision making in society?
  47. introduction to modal logic

  48. Are omniscience and omnipotence mutually inconsistent?

  49. Suspending some of the usual laws of logic
  50. Is there an explanation of how logic works?
  51. How to valuate (assign truth values to) a formula in modal logic (Kripke model)

  52. Is finding truth possible?

  53. Is the phrase "trust but verify" self-contradictory?
  54. Proof that the rules of logic are true

  55. Can I get help translating the following English sentences to first order logic sentences with identity

  56. Using deductive logic

  57. Can there only be one success in an infinite amount of trials?

  58. Question about Syllogisms

  59. logical fallacy: X is not wrong, if you have done X
  60. Do premises in modus tollendo tollens arguments require greater certainty than others?

  61. Do "if everybody did it" arguments commit a fallacy?
  62. Someone said argument A, the other heard argument A', is that a fallacy?

  63. Does this make sense? Is it a contradiction? If a triangle has 2 sides, then it wouldn't be a triangle

  64. The difference between indicative conditional and counterfactual

  65. Logic and Computation : a philosophical viewpoint

  66. Is something creating itself nonsense?
  67. Comparison of unlike things - Being Logical

  68. Dictionary English - logic/formal symbols/expresssions

  69. What are the differences between philosophies presupposing one Logic versus many logics?

  70. Is the statement "Nothing is absolute" a contradiction?

  71. Predicate logic proofs - how to split a conjunction bound by two quantifiers

  72. Expressing a sentence in predicate logic
  73. How do you translate If Michael is incorrect then the Washington Monument is made of granite in predicate logic?
  74. Example for Toulmin's model advantages

  75. Can anyone assist me with Toulmin's model of argumentation in Philosophy?

  76. why isn't humanistic logic taught in schools any more?
  77. What are the philosophical implications of category theory?

  78. Propositional Proofs

  79. In predicate logic, do we necessarily have to restrict the domain of discourse?
  80. Is it logically correct to say that if A implies B then not A implies not B?
  81. What are the important effects of studying logic?

  82. Can something be actually possible yet logically impossible?

  83. Is this a valid argument (using probability and uncertainties)?

  84. What fallacy dismisses criticism of a bad law with "just don't break it"?

  85. Create a statement in propositional logic. This statment must have 2 attributes. (The attributes are specified in the top header)
  86. Introduction to science philosophy

  87. Is a statement with an undefined term a statement?

  88. What is the name for the fallacy where the very act of making a statement contradicts its truth?

  89. Only valid syllogisms are syllogisms?
  90. Is syllogism an inference rule?

  91. Prove ( ¬P ∨ Q) ↔ (P → Q)
  92. Quantificational vs Referential vs Predicational descriptions
  93. fallacious proof
  94. Is reduction to the absurdum to be considered a syllogism?

  95. Prove whether statement is true or false
  96. Proof Universe Came From Nothing?
  97. Is there a logical system that accounts for cause and effect relationship?

  98. Definition of proposition

  99. In propositional logic, why can a FALSE antecedent of conditional be simplified to TRUE?
  100. Can Deduction for a Valid Argument produce the wrong conclusion?