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  2. Geometry Dash - Wikipedia

    en.wikipedia.org/wiki/Geometry_Dash

    Geometry Dash Lite is a free version of the game with advertisements and gameplay restrictions. Geometry Dash Lite includes only main levels 1-19, all tower levels, and a few selected levels that are either Featured, Daily, weekly or Event levels but does not offer the option to create levels or play most player-made levels. It also has a ...

  3. Direct proof - Wikipedia

    en.wikipedia.org/wiki/Direct_proof

    A direct proof is the simplest form of proof there is. The word ‘proof’ comes from the Latin word probare, [3] which means “to test”. The earliest use of proofs was prominent in legal proceedings.

  4. On the Fourfold Root of the Principle of Sufficient Reason

    en.wikipedia.org/wiki/On_the_Fourfold_Root_of...

    It [the principle of sufficient reason] explains things in reference to one another, but it always leaves unexplained something that it presupposes,” and the two things that are absolutely inexplicable are the principle itself and the “thing in itself”, [7] which Schopenhauer connects with the will to live. The principle, in another point ...

  5. Validity (logic) - Wikipedia

    en.wikipedia.org/wiki/Validity_(logic)

    A statement can be called valid, i.e. logical truth, in some systems of logic like in Modal logic if the statement is true in all interpretations. In Aristotelian logic statements are not valid per se. Validity refers to entire arguments. The same is true in propositional logic (statements can be true or false but not called valid or invalid).

  6. List of paradoxes - Wikipedia

    en.wikipedia.org/wiki/List_of_paradoxes

    Grice's paradox: Shows that the exact meaning of statements involving conditionals and probabilities is more complicated than may be obvious on casual examination. Intransitive dice : One can have three dice, called A, B, and C, such that A is likely to win in a roll against B, B is likely to win in a roll against C, and C is likely to win in a ...

  7. Talk:Geometry Dash - Wikipedia

    en.wikipedia.org/wiki/Talk:Geometry_Dash

    It states that in Geometry Dash Lite online features are disabled, although in a relatively new update, online levels were enabled, the featured level list, daily level, weekly demon, and event level have been enabled in the game. 2A00:23C7:7A0B:2601:92A6:115:48DE:74ED 23:15, 15 December 2024 (UTC)

  8. Mathematical proof - Wikipedia

    en.wikipedia.org/wiki/Mathematical_proof

    Presenting many cases in which the statement holds is not enough for a proof, which must demonstrate that the statement is true in all possible cases. A proposition that has not been proved but is believed to be true is known as a conjecture, or a hypothesis if frequently used as an assumption for further mathematical work.

  9. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    An axiom or postulate is a mathematical statement that is taken to be true without need of proof. If a mathematical statement has yet to be proven (or disproven), it is termed a conjecture. Through a series of rigorous arguments employing deductive reasoning, a statement that is proven to be true becomes a theorem.