It is always best when attempting to resolve a problem with your genealogy to work from the known to the unknown. This seemms like such a simple concept, but for a lot of genealogist they do not do this.
An excellent way of putting the know in a format that will allow you to understand the unknown is to put it into a timeline format. Starting with the birth date of the individual in chronological order identify each date that you have documented on the person. This will help you identify the gaps that you have as compared to what you know and will allow you to create a research plan to fill in the gaps. It will also force you to understand why certain records were not avaliable at certain time periods and force you to look at other sources to resolve the puzzle. In the end you should have a very clear understanding of the person once you have completed your exhaustive search.
Try it and let me know how you come out.