Is a jury permitted to convict a defendant solely based upon circumstantial evidence?

Depends.

Explanation:

If that's enough to make the jury think that they are guilty, beyond a reasonable doubt then yes. If they have even the smallest doubt in their mind, then no.

so you come to the correct conclusions and make the right decision based on good judgment and a clear mind and valid thought processes behind it, and not just hasty thinking and recklessness.

explanation:

hey love i hoped this if it didn't let me know. you so much and have a wonderful day : ) keep doing the very best you can and never give up you can do it

all i have to say is that people are truly ignorant and don't have anything better to do with their lives.