debatable
1. [ adjective ] open to argument or debate
Synonyms: disputable moot arguable
Examples:

"that is a moot question"

Related terms: controversial
2. [ adjective ] open to doubt or debate
Synonyms: problematical problematic
Examples:

"If you ever get married, which seems to be extremely problematic"

Related terms: questionable
3. [ adjective ] capable of being disproved
Synonyms: disputable moot
Related terms: contestable