Half-Concealed Qualification
A half-concealed qualification slips a limiting word into a premise, then draws a conclusion as if the limit were not there. Debaters answer by restoring the qualifier and showing that the conclusion no longer follows.
Half-Concealed Qualification as it appears in championship debate rounds. Each example below is a moment from a real round, with a note on why it illustrates the technique and how a debater can use it, or answer it.
Example 1: The affirmative asks for the next line of the negative's 73% unionization card
It reveals two qualifiers the negative left out: the figure covers only construction-sector unions, and the author says infrastructure is not a good way to boost unionization. This exposes a half-concealed qualification behind a headline number. When an opponent cites a striking statistic, call for the card and read the surrounding lines to shrink the scope of their impact.
Example 2
In cross-ex, the affirmative reads out the qualifiers buried in the negative's Matthews card ('may not seem likely,' 'while such possibilities are unlikely'), which undercut the card's own World War III claim. This exposes a half-concealed qualification: the highlighted impact hides the author's admission that it is improbable. Students should read the unhighlighted text of opponents' cards for hedges like these and quote them back, and they should avoid cutting cards whose authors disclaim their own conclusion.
Example 3: In cross-examination the questioner reads the unhighlighted part of the opponent's own card
That part admits countries giving up nukes may shift toward conventional build-ups in the short term, and that this is only solved by a conventional arms treaty the plan never creates. This exposes a qualification the other team hid by not underlining it. Read your opponents' full cards in prep or CX and quote the parts they skipped; when you cut your own evidence, be ready to defend the qualifications you left out.
Sources: every example links to the YouTube video of the championship debate it comes from, at the moment described.
All techniques and fallacies