impossible [Adjective] + nigh on [Adverb]

Strength Strength Dispersion
A:
7
CHISQ:
149.17
AWT:
17,547,462
TTEST:
2.53
G2:
37.96
FAWT:
3.1
MI:
4.53
LOGLOG:
12.71
JD:
0.63
MI3:
10.14
DICE:
0.2
RANGE: