Complex sentence: No simple and singular determinant for sexual orientation has been conclusively demonstrated; various studies point to different, even conflicting positions, but scientists hypothesize that a combination of genetic, hormonal, and social factors determine sexual orientation.
Split into simpler sentences: No simple and singular determinant for sexual orientation has been conclusively demonstrated; various studies point to different, even conflicting positions. Other scientists hypothesize that a combination of genetic, hormonal, and social factors determine sexual orientation.