Ihave been out and about with little time to reply to the several comments that Bob has made. So, I will limit myself to reply to the following at this time:
The evidence you refer to, is it universally acknowledged without exception by scientists, or are there scientists of a contrary opinion that present contrary evidence on this question?
Yes, as I have stated, there are those who disagree with me. Some of them are scientists who have published their views and research that they have done along with their conclusions from their research. They are a minority group. There are generally several issues with their research and publications:
1) The news media has commonly gone beyond what the scientists have actually concluded. As a result, a careful review of what they have actually claimed is often much less than what has been claimed by the media.
2) Often the subjects who are said to have changed their orientation were bi-sexual in the beginning rather than homosexual.
3) It has often been behavior that has changed and not gender preference.
4) The subjects have often continued to fantisize about homosexual behavior even when engaged in heterosexual behavior--still showing same sex gender preference.
5) Often the change in behavior has been to a lower level of sexual relationship with someone of the same gender.
Some years back a pair of authors pubished a study that was claimed to show that sexual orientation could change. I wrote on that study and found that all of what I have stated above existed in that study. Expecially true was the issue of the media reporting much more than the authors claimed. I was asked by one magazine to expand the brief piece that I had written into an longer article. But, I declined to do so sue to a lack of time at that time.
However, I will give you one example of such a scientist.
Robert Spitzer published a paper in 2001 that has been claimd by the media to prove that homosexuals could change their orientation and become straight. Spitzer had the scientific credentials. I do not challenge that. HE became very disturbed as how his paper was being reported int eh media. In an interview on CNN on May 9, 2001, he was directly asked: "... are you saying that a homosexual can choose to be strainht?" Spitizer's response was: "No, I'm certainly not saying that."
A careful analysis of Spitzer's work shows that everyone of the issues that I have listed above were present in his study, as well as some others issues.
I am not willing to say that a person who is engaging in heterosexual sex and who at that very moment is thinking in their mind about homosexual sex with someone of the same gender has changed their gender preference.
I am not willing to say that a person who changes to a less explicit level of homosexual encounter with someone of the same gender has changed their gender preference. On this point, the SDA denomination has suffered some major wounds. In the interests of protecting the privacy of individuals I will not say anything further on this point.