The New Jersey Rules of Evidence and supporting case law do not require that lay testimony and even lay opinion testimony, although based on scientific, technical or even specialized knowledge, automatically triggers the need for the designation of the witness providing that testimony as an expert. The fact that a person with personal knowledge of facts relevant to a dispute may also qualify as an expert in the particular field associated with those facts does not convert his or testimony into expert testimony under N.J.R.E. 702 and 703.