Synonyms:
baffling, elusive, knotty, problematic, problematical, tough
Meaning: making great mental demands; hard to comprehend or solve or believe; "a baffling problem"; "I faced the knotty problem of what to have for breakfast"; "a problematic situation at home"
Synonyms:
debatable, problematic, problematical
Meaning: open to doubt or debate; "If you ever get married, which seems to be extremely problematic"
Usage examples
To say that thinking occurs with reference to situations which are still going on, and incomplete, is to say that thinking occurs when things are uncertain or doubtful or problematic.