A dicto simpliciter or ad dictum simpliciter (Latin: "to a maxim without qualification", meaning "to a universal rule") are Latin phrases for a type of logical fallacy.

A dicto simpliciter fallacies are deductive fallacies

Deductive fallacy

A deductive fallacy is defined as a deductive argument that is invalid. The argument itself could have true premises, but still have a false conclusion...

 that occur in statistical syllogism

Statistical syllogism

A statistical syllogism is a non-deductive syllogism. It argues from a generalization true for the most part to a particular case .-Introduction:Statistical syllogisms may use qualifying words like "most", "frequently", "almost never", "rarely",...

s. A dicto simpliciter occurs when an acceptable exception is ignored or eliminated. For instance, restaurant kitchens must regularly undergo government inspections for food safety. If one were to argue from this that all kitchens, including home kitchens, should be visited by government inspectors, it would be an a dicto simpliciter fallacy.

Instances of a dicto simpliciter are of two kinds:

• Accident
  Accident (fallacy)
  The logical fallacy of accident is a deductive fallacy occurring in statistical syllogisms when an exception to a rule of thumb is ignored. It is one of the thirteen fallacies originally identified by Aristotle...
  
   — a dicto simpliciter ad dictum secundum quid (Where an acceptable exception is ignored.) [from general to qualified]
• Converse accident
  Converse accident
  The logical fallacy of converse accident is a deductive fallacy that can occur in a statistical syllogism when an exception to a generalization is wrongly called for.For example:The inductive version of this fallacy is called hasty generalization...
  
   — a dicto secundum quid ad dictum simpliciter (Where an acceptable exception is eliminated or simplified.) [from qualified to general]

See also

• For inductive
  Inductive reasoning
  Inductive reasoning, also known as induction or inductive logic, is a kind of reasoning that constructs or evaluates propositions that are abstractions of observations. It is commonly construed as a form of reasoning that makes generalizations based on individual instances...
  
   fallacies that may affect the soundness
  Soundness
  In mathematical logic, a logical system has the soundness property if and only if its inference rules prove only formulas that are valid with respect to its semantics. In most cases, this comes down to its rules having the property of preserving truth, but this is not the case in general. The word...
  
   of some statistical syllogisms, see faulty generalization
  Faulty generalization
  A fallacy of defective induction reaches a conclusion from weak premises. Unlike fallacies of relevance, in fallacies of defective induction, the premises are related to the conclusions yet only weakly buttress the conclusions. A faulty generalization is thus produced...
  
  .
• Card stacking
  Card stacking
  Card stacking is a propaganda technique that seeks to manipulate audience perception of an issue by emphasizing one side and repressing another...
  
  often uses a dicto simpliciter.