I know this is "a very controversial subject," but what is the definition of marriage that these people are proposing that will include same-sex relations within it?

The only definition of marriage that I know of is the commitment between a man a woman, to give their lives to each other for their own good and to raise and educate their children... This commitment is an act of love... And their union is one of love...

The reason that civilization is interested in marriage (as an institution) is because the civilization is interested in the (1) well-being of its citizens, and (2) their offspring (future citizens).

Check. Yes, that would be nice. But, having "satisfying and safe sex life" is NOT an inherent "right" of a member of the human race, however much people may not like hearing that.

PRINCIPLE: NO PERSON HAS AN INHERENT RIGHT TO ANOTHER PERSON'S BODY.

In fact, we say that we only hold our basic rights if they do not infringe upon the rights of others.

The basic rights in the American traditional are "life, liberty, and the pursuit of happiness," and the subtext there is so long as the exercise of these for any one person does not obstruct the 'life, liberty, and pursuit of happiness' of any other person."

Sex naturally requires another person's body, and thus cannot possibly be one of our inalienable rights, since we have no inherent "right" to another's body.

Proper (Christian) Marriage establishes a kind of "right" to another's body: a "right" established by mutual and entire gift of self. The man and the woman, in marriage, give themselves entirely to each other (necessary but repetitive subtext: in Christ): their hearts, their minds, their bodies - their future lives, and in a way, their souls. (To give their souls completely would be (A) a metaphysical impossibility, and (B) a grave offence against God methinks, but more thoughts on that later...)

Marvelously, this principle also shows why abortion is wrong. That baby inside is not the mother's body - science, which deals purely with the facts and objective, sensory evidence, will tell you that. And morality tells you the principle written above.

"How does logic lead man in a search for truth?"

Yahoo search pinged my site for this phrase, although it was so mis-spelled that I wondered for a few minutes about the searchee's logic, humanity, and vision of truth.

However...

Logic is a method, some say the primary method, of the exercise of man's rationality. Logic is the tool that man uses to reason. Man's rationality is his ability to attain knowledge or understanding by moving from one thing to another.

Man, by exercising logic, comes to know the explicit truth of many things he previously did not know.

Now, some argue that the syllogism is not the method by which he does that, and that, in fact, the truth in the conclusion of the syllogism is inherent in, and contained in the premises. This would define the syllogism as a formal mode of presenting truth, but not necessarily an instructive mode.

More on this later...