否定・回避N1
〜と言えなくもない
it's not that one couldn't say... / it's not entirely untrue that...
Structure
普通形 + と言えなくもない
Explanation
A double negative: it is not entirely untrue to say...; a tentative affirmation.
Examples
彼の言い分も、一理あると言えなくもない。
It's not entirely untrue that his argument has some merit.
この計画は、やや無謀だと言えなくもない。
One could say this plan is somewhat reckless.
Note
Synonymous with と言えないこともない. A reserved, tentative expression.