can u grow dank with non dank seeds?

Are you saying you got a few seeds out of a bag of schwag?

im just wondering if i can use those and grow dank

OK, here's the thing with seeds. A seeds potential is locked within its DNA.You can take a seed from a bag of great weed and grow crap if you don't give the plant what it needs.
You can also grow decent smoke from a bag of schwag. Because most of the
Mex ditch weed is grown with virtually no plant care, improper nutrition, and
is thrown on the ground in the sun to dry and cure, you get crappy herb.
But if you were to take that same strain and grow it under optimal conditions, harvest at the right time, and dry and cure properly, you would get a completely different bag of herb.
Most of the seeds you get out of a bag you bought were fertilized by a hermy that snuck in the crop, or a male not seen.
So to Answer in short, yes you can if you give the proper care, but it's not reccomended.

im going to stick with some dank seeds to use then. thanks man.