I think the more important thing is consistency rather than realism in many cases. Realism becomes useful because game rules can't account for everything and barring a specific rule players are likely to presume that objects would act as they do in reality. If you make it clear that faster than light communication is possible in your universe, and that rule applies to everyone equally, then it's fine.
The thing is that Traveller explicitly excludes faster than light communication by any means other than jump drive, and if you can detect something (like "tachyons") faster than light you can communicate faster than light, so if you do something like that, make it clear that your Traveller Universe is different than the official one in that regard.
-------- Original Message --------
On February 6, 2018 9:32 AM, Catherine Berry <xxxxxx@gmail.com> wrote:
If Robert Heinlein can
get away with having a nuclear explosion cause time travel, you can get away with having one cause tachyons. :)
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