Whether expert evidence based on or involving cognitive science is sufficiently reliable to satisfy the requirements of Federal Rule of Evidence 702 or comparable State rules for the admissibility of expert evidence

United States v. Vasquez, 858 F.2d 1387, 1392 (9th Cir. 1988) (upholding trial court's admission of officer's testimony identifying defendant's fingerprint which was found on a package of cocaine seized in his apartment....Handwriting or any other matter requiring authentication may be authenticated by having an expert witness compare the disputed handwriting or other matter with an authenticated specimen or exemplar and testifying that the author or maker of the disputed handwriting or other matter and the specimen or exemplar is the same person.

United States v. Casas, 356 F.3d 104, 124-125 (1st Cir. 2004) (upholding trial court's admission of several challenged statements as they were admissible non-hearsay pursuant to the co-conspirator exception in Federal....Hearsay is a statement that (i) is made other than at the trial or proceeding at which it is offered and (ii) is offered to prove the truth of the matter asserted by the maker of the statement, the declarant.

Kumho Tire Co. v. Carmichael, 526 U.S. 137, pin? (1999) (_Daubert_'s requirement of reliability for admissibility applies to non-scientific expert evidence as well as to expert evidence based on scientific principles and methods; trial court has the the duty and the authority...The trial court must act as an independent gatekeeper. The trial court can admit expert or scientific evidence only if it finds that scientific, technical, or other specialized knowledge will assist the trier of fact to understand the evidence or to determine a fact in issue, a witness qualified as an expert by knowledge, skill, experience, training, or education, may testify thereto in the form of an opinion or otherwise, if (1) the testimony is based upon sufficient facts or data, (2) the testimony is the product of reliable principles and methods, and (3) the witness has applied the principles and methods reliably to the facts of the case.