join up the dots

join up the dots

add the missing links in a line of reasoning (and reach the inevitable conclusion).
The expression is based on the idea of an outline drawing made by tracing a line through a series of dots.
2003 Scotland on Sunday The Mercury Music Prize…really helped us to be taken seriously. I think a lot of people knew the songs but didn't necessarily know they were by us so it also helped to join up the dots for them.
See also: dot, join, up