surely;  clearly;  without a doubt;  in all probability;  no matter how one slices it;  no matter how one looks at it
 to reconsider;  to rethink;  to reassess
 something to think about;  one's thoughts;  concern;  thinking about something;  being absorbed in one's thoughts
 if you think about it;  come to think of it
 to be conceivable that;  to be thinkable that
 to think out;  to devise;  to invent;  to begin to think;  to come up with a plan
 to think of;  to come up with
 on closer reflection;  on second thought;  come to think of it;  actually
 difficult to imagine;  quite unlikely to;  very doubtful;  would not expect
 mistaken idea;  misunderstanding;  wrong impression
 unthinkable;  unimaginable;  inconceivable;  unclassifiable;  never dreamt of
 to think too much;  to be over-concerned
 to contemplate;  to ponder;  to think long about;  to turn over in one's mind
 the more I think about it;  the more one thinks about it
 to collect one's thoughts;  to gather one's thoughts;  to put one's ideas in order
 unthinking;  thoughtless;  heedless;  inconsiderate
 to be at a loss;  to think and think but get nowhere;  to fail to come up with a good idea
 without thinking of the consequences
 to be absorbed in thought;  to muse;  to muse about;  to think things through
 to take (all of) into consideration
 it's hard to tell a poor thinker from a sleeping one;  they to whom only bad ideas come might as well be asleep;  inadequate ideas are worse than none at all
 thoughtless;  heedless;  rash
 (in the middle of) considering;  deliberating
 it's hard to tell a poor thinker from a sleeping one;  they to whom only bad ideas come might as well be asleep;  inadequate ideas are worse than none at all
 way of thinking;  one's perspective
 unthinkable;  unimaginable
 prejudiced opinion;  conventional ideas