"If so" should accept any statement, not only "Let us..."

[GallowsDove]

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If there is for example a statement: If so, you are as cowardly as a chihuahua.

this should be also considered as valid input, however, currently it throws parser error: "expecting one of: Let We"

[zmbc]

Thank you for reporting this @GallowsDove!

I only noticed a few months ago that the spec said conditionals (both "If so" and "If not") can apply to any sentence type. I am currently doing a major overhaul of this package and this is one of the issues I hope to correct in the next release.

[zmbc]

A bit late here (it's been out since January) but 1.0.0rc1 supports this -- feel free to test it out!