Explanation
Used to express an action or state is 'not impossible', but emphasizes reluctance or doubt.
Formation
Verb-ないForm + こともない, い-adjective + こともない
Detailed explanation
The ～ないこともない grammar point is used to express that something is not impossible, but the speaker is reluctant, has doubts, or deems it as a less favorable option. It can be translated as 'not that one can't', 'not that it's impossible', or 'it's not out of the question'.
Examples
Kono mondai wa tokenai koto mo nai kedo, muzukashii desu.
It's not that I can't solve this problem, but it's difficult.
Kare ni awanai koto mo nai ga, amari hanasu jikan ga nai.
It's not that I can't meet him, but there's not much time to talk.
O-kane ga nai koto mo nai keredo, setsuyaku shita hou ga ii.
It's not that I don't have money, but it's better to save.
Kono geemu ga omoshirokunai koto mo nai ga, hoka no geemu no hou ga tanoshii.
It's not that this game isn't interesting, but other games are more fun.
Practice
Grammar content sourced from hanabira.org.