# User posting answer of an unavailable tool [duplicate]

I have noticed a user making questionable answers. Here are some examples:

In all cases, he is purporting to use a tool called ngn/k - this raises a couple of concerns:

1. as his name is ngn, he wrote the tool

2. both the page he links to and his similar github page host no software, only a readme: https://gitlab.com/n9n/k and https://github.com/ngn/k

to me this is not acceptable - if someone is posting and getting upvotes on answers, they should be using a publicly available tool, and ideally an open source one.

• It is publicly available - the full binary is on TryItOnline – ASCII-only Jul 5 '18 at 3:06
• It appears not to be open source for the time being, but that doesn't mean ngn would be unwilling to open-source it – ASCII-only Jul 5 '18 at 3:07
• From previous commits of the readme: I don't make the source code and the binary publicly available at this time. – Jo King Jul 5 '18 at 3:09
• – user202729 Jul 5 '18 at 3:12
• The binary can be taken from TIO though (link to part of binary), so you can download and run it to verify the solutions. ngn/k is an implementation of k though, so you can also switch to oK, which has near identical behavior – ASCII-only Jul 5 '18 at 3:12
• @ASCII-only I wouldnt call reverse engineering TIO "downloading" – Steven Penny Jul 5 '18 at 3:18
• Also: Avoid asking more than 1 question in 1 question. You're asking (1) is it ok to use a language you write yourself (2) proprietary languages. – user202729 Jul 5 '18 at 3:35
• So "completely unavailable" and "unavailable without paying" are slightly different... – user202729 Jul 5 '18 at 4:26
• @StevenPenny sure. but it does mean that the binary is publicly available – ASCII-only Jul 5 '18 at 8:33