One of the things you need to be careful in depositions is not to let the other side sneak in presumptions. For example, if you are questioned about design doc number X and the question refers to it as "that design doc with 3D IR heated chamber", you want the question to be rephrased and use a proper 'design doc number X' before you answer. Otherwise you implicitly admit that that design doc includes "an IR heated chamber for a 3D printer" which can be used against you. It this case, one of the lawyers says clearly "the word photocopy is an issue in this case".
Depositions are adversarial processes and the other lawyer is not your friend. Generally speaking engineers have problem with depositions because they try to 'explain difficult technical details' and often provide more information than the question required. For example, if the question is 'what is Arduino?', 'it's a company name' or even 'can you please be more specific' are valid answers.
(I am not a lawyer).