PERIODIC TABLE OF ARGUMENTS

By Jean Hubert M. Wagemans — Last updated on September 13, 2026

Argument from comparison

You rate one thing by setting it beside another that already carries the rating you want. The argument works because the second thing is agreed to be excellent, or dreadful, and the first is held to belong in the same bracket, so the agreed rating is passed along. It can be attacked by denying that the two are of a kind — which rejects the argument without disputing anything about the second thing.

Tile for the argument from comparison (Cpa)

Example

The Jane must be an excellent restaurant because Oud Sluis is an excellent restaurant

Standardised form

The Jane (a) must be an excellent restaurant (X) because Oud Sluis (b) is an excellent restaurant (X).

Transformations applied: none — the example is already in canonical form.

Triadic structure of the argument from comparison example: conclusion, premise and lever

Classification

The subjects differ and the predicate is the same, so the argument form is beta (a is X because b is X).

The conclusion is about one specific restaurant (s) and the premise about one specific restaurant (s), so the argument substance is ss.

The keyword COMPARABLE describes the relationship between subjects a and b. The argument lever can thus be formulated as “The Jane (a) is COMPARABLE to Oud Sluis (b)”.

Not to be confused with

  • Argument from similarity — What is transferred is something that happened rather than a judgement of quality. F ← F
  • Argument from equality — What is transferred is an entitlement, and the premise remains factual. P ← F
  • Argument from analogy — The umbrella type, which covers all three of these without fixing the kind of claim transferred. ANALOGOUS
  • Metaphoric argument — The second case is a figure of speech, and the shared verdict is left unstated. METAPHORICALLY

Source

Source not yet recorded.

Screenshot of the report of Abraham Lincoln's reply to the National Union League, 9 June 1864

Other examples

  • “You’ll love this book (a). You liked her last one (b)!” — source not yet recorded.
  • “It is not best to change the president in wartime (a) because it is not best to swap horses when crossing streams (b).” — adapted from a report of Abraham Lincoln’s reply to the Delegation from the National Union League, 9 June 1864.

Notes

See the note on the argument from analogy.