The human factors may not be in your favor. Look at yourself. Look at your opposition. Look at everyone who is likely to testify in your case. This may be only a minor concern.
Most people are good storytellers when the story is true.
But the very young or very old witness may become flustered. Non-English speaking or inarticulate witnesses simply may not be understood, thus their testimony may discounted. All you have seen and heard about civil trials may fill you with fear about testifying under oath in a courtroom before a person wearing a black robe. This may be true even though your fear has been diminished by your careful preparation and all the knowledge gained by reading this book. Consider settlement as a real possibility at any point in the process that you realize you may not be able to win.