Most affirmative teams today generally frame their case around advantages, which are good effects of their plan. The negative team will often present disadvantages which contend that the affirmative plan causes undesirable consequences. In an attempt to make sure that their advantages/disadvantages outweigh those of the other team, debaters often present extreme scenarios such as the extinction of the human race or a global nuclear war. Negation Tactic, also known as Negation Theory, contends that the negative need only negate the affirmative instead of having to negate the resolution. The acceptance of all-inclusive negation, as opposed piecemeal, allows Negative teams to run full argumentation outlines such as topical counterplans with better Solvency that affirms the resolution but still negate the Affirmative's plan. After the affirmative presents its case, the negative can attack the case with many different arguments, which include:  Evidence in debates is organized into units called "cards" (because such evidence was originally printed on note cards, though the practice has long been out of favor). Cards are designed to condense an author's argument so that debaters have an easy way to access the information. A card is composed of three parts: the argument or evidence summary, the evidence that supports the argument, and the citation. The argument part, sometimes called the "tag", is the debater's summary of the argument presented in the body. A tag is usually only one or two sentences. The "citation" contains all relevant reference citation information (that is, the author, date of publication, journal, title, etc.). Although every card should contain a complete citation, only the author's name and date of publication are typically spoken aloud in a speech. Some teams will also read the author's qualifications if they wish to emphasize this information. The "body" is a fragment of the author's original text. The length of a body can vary greatly—cards can be as short as a few sentences and as long as two or more pages. Most cards are between one and five paragraphs in length. The body of a card is often underlined or highlighted in order to eliminate unnecessary or redundant sentences when the card is read in a round. In a round, the tag is read first, followed by the cite and the body. As pieces of evidence accumulate use, multiple colors of highlighting and different thicknesses of underlining often occur, sometimes making it difficult to determine which portion of the evidence was read. If debaters stop before finishing the underlined or highlighted portion of a card, it is considered good form to "mark" the card to show where one stopped reading.