= Solution
\b[TODO: Testing F for <oxalic acid> remains incomplete.] The <chemical solution> and its observed test results are unavailable, so neither the presence nor the absence of <oxalic acid> can be reported.
\b[TODO: Testing G for <antimony> or <arsenic> remains incomplete.] The <chemical solution> and its observed test results are unavailable, so neither <antimony> nor <arsenic> can be identified or excluded. The alternatives named in the paper specify what to investigate; they do not establish what G contains.
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