2A2 [Exclusions from Convention (purchases for personal family or household use): seller's lack of knowledge of buyer's purpose (burden of proof): dicta reference];

4B [Scope of Convention (issues excluded): Convention's rules on burden of proof can only apply to matters within its sphere of application (not question what effect seller's written recognition that the goods were non-conforming has on burden of proof];

19A ; 19C ; 19D [Acceptance with modifications: reply purporting to accept but containing additions or modifications; Modifications that are material; Goods are accepted when "acceptance" differs materially from offer: possible approaches];

35A [Conformity of goods to contract: quality, quantity and description required by contract];

79A [Exemption from liability for damages: need to prove impediment (example of burden of proof issue regulated by the CISG)]