I think by hard sci fi people mean that faster than light travel doesn't exist (aka the warp, tacheon drives, space folding, etc. etc.). I agree on it mostly be

I think by hard sci fi people mean that faster than light travel doesn't exist (aka the warp, tacheon drives, space folding, etc. etc.). I agree on it mostly being fantasy (and reading it just this year you can see it was written when string theory was hot)