Thank you for the link element,
A knife needs both properties; the mind is the same. To do what it needs to do the mind requires both samädhi and paññä. You might wonder what it is that cuts, is it the knife's weight or its sharpness? If you can understand this, it will be easier for you to understand how Dhamma cuts through problems, that is, mental defilements. In the moment of sampajanna's activity, both samädhi, and paññä are working together to slice through the problem. They're interconnected and, in practice, can't be separated.
This is particularly interesting for me. After coming out of a 10 day retreat last year october, this pervasive awareness of touch of breath (while awake) has stuck with me, and I'm continually shocked by the number of defilements that arise throughout the day... observing breath, observing defilements, what a fun job! Slowly tiring out the monkey mind. (Note:slowly)