Main phases of proof & their scope; phases of witness interrogation and their scope; form of witness interrogation; foundations & offers of evidence; objections; rulings on evidence offers and on objections; offers of proof after adverse rulings on offers of evidence.

Cf. Swinton v. Potomac Corp., 270 F.3d 794, 814-815 (9th Cir. 2001) (upholding trial court's admission into evidence of employer's remedial conduct undertaken in response to its discovery of discrimination because it was....A subsequent remedial measure is not barred by the rule limiting admissibility of subsequent remedial measures if the subsequent remedial measure is offered to impeach a witness or to show any matter (such as ownership, control, or feasibility of precautionary measures) other than negligence, culpable conduct, a defect in a product, a defect in a product's design, or a need for a warning or instruction; but a subsequent remedial measure may be used to show feasibility of precautionary measures only if feasibility has been controverted.

United States v. Koziy, 728 F.2d 1314, 1322 (11th Cir. 1984) (holding, in plaintiff US government's action against defendant for revocation of citizenship and cancellation of certificate of naturalization, that the trial....Federal Rule of Evidence 803(16) and comparable State rules create a hearsay exception for statements in an authenticated document that is more than a certain number of year old, typically twenty years.

Presley v. Lakewood Engineering and Mfg. Co., 553 F.3d 638, 643 (8th Cir. 2009) (plaintiffs offered testimony of "a fire expert and electrical engineer, to investigate the cause of the fire and formulate a theory of fire causation"; the trial court did not err in excluding this evidence for purposes of...A field or method that is offered as as a scientific field or method satisfies the requirements for the admissibility of evidence under Federal Rule 702 or a comparable State rule only if the field or method is shown to be genuinely scientific.