Re: Set class does not check {} by Nathan Wallach - Monday, 24 August 2020, 1:47 PM Number of replies: 0 There is a PR by Davide with a corrected version of the Union answer checker at https://github.com/openwebwork/pg/pull/492 which is likely to make it into WW 2.16. Until the, systems can be manually patched or the workarounds above can be used. Permalink Show parent Reply