the catholic church has never contradicted itself, from an official capacity

It's certainly an interesting one, considering that the affirmative burden is incredibly low; inasfar as right off the bat you exclude two pretty big theological issues (limbo and no salvation outside the church), you concede that, like any other imperfect institution in the world, the Catholic Church has indeed contradicted itself. Nevertheless, I accept and meet your burden. The resolution makes a normative statement: the church has never contradicted itself. Correspondingly, this means that it is the burden of the con to prove only a single instance in which the church has contradicted itself in order for there to be a con vote. Thus, rather than going through a rote list of tensions and contradictions, I will instead focus on one doctrinal teaching. Note that in this instance I am not arguing that the church is contradicting a previous teaching (e. g. saying something and then saying, "No, we didn't say that"), nor am I saying that the church has contradicted itself because of its failure to live up to its practices. Rather, I am arguing that two related doctrines of theirs, when juxtaposed, produce a contradiction. The thesis and sole contention of the con in this debate is that the Catholic teachings on contraception, when juxtaposed with their advocacy of "Natural Family Planning" (NFP), produce a contradiction. [For the purposes of this debate, I will refer to Peter Kreeft's excellent annotated version of the official Catechism. See Peter Kreeft, Catholic Christianity (San Francisco, CA: Ignatius, 2001). ] 1. The Catholic Church opposes contraceptive techniques such as "the pill" or condoms. "This particular doctrine [of procreation in the Catholic Church], expounded on numerous occasions by the Magisterium, is based on the inseparable connection, established by God, which man on his own initiative may not break, between the unitive significance and the procreative significance which are both inherent to the marriage act" (Catechism of the Catholic Church, qtd. in Kreeft 250). Simply put, the intentionality behind sex must include two criteria: (1) sex must be for the purposes of uniting the married couple, and (2) sex must be open to the possibility of the creation of a new being as a result of that unity. 2. However, in response to those concerned that they might have too many children and not be able to provide for them, the Church advocates Natural Family Planning (NFP), a policy whereby "methods of birth regulation based on self-observation and infertile periods" is used (Catechism of the Catholic Church, qtd. in Kreeft 250). This involves charting the woman's ovulation cycles, having sex during breastfeeding, amongst other things. 3. The Contradiction: Look to the second criterion under the first point. It says that the man and woman involved in the sex act must be open to the possibility of the creation of a new being as a result of their unity. If NFP, widely held church teaching, is true, then Catholics all the time violate this standard. Under NFP, you are still deliberately trying to avoid the result of new life being created. Thus, Catholic teaching on legitimate standards for birth control clearly violates Catholic teaching concerning the nature of the sex act in marriage. I urge a vote in favor of the CON, and I look forward to my opponent's remarks.