In regard to debate, audiatur et altera pars is the principle of stating all premises in one's argument. Many times people argue from assumptions that are not clearly stated, if at all. While it is not necessarily fallacious not to state all premises, one's motives for not stating all premises in an argument could be brought into question which can be detrimental to the argument.
In order to present the most clear and convincing argument, one should spell out all premises, no matter how pedantic it may seem. The more thoroughly someone understands your position, the more clearly you can state your argument.