On Memories and Recall/Recovery

So, I was pondering this a while.
We see in the movie that mind workers can use recall tubes to send certain memories up to Headquarters (Triple Dent Gum
), and also dispose of memories in the Memory Dump.
However, here's the pressing question.
Can memories in the Memory Dump be recovered even after they have faded away? I mainly ask based on when Bing Bong faded away, is it possible for him to return by, say, Riley finding an old drawing she may have made of him (assuming she must have taken her stuff from home in Minnesota) and Bing Bong possibly regenerates in her mind.
And... that's all for my attempt at an Inside Out discussion thread right now. Really wanting to do more sometime soon in the future.
Until then, I'd like to get a few opinions on this.
We see in the movie that mind workers can use recall tubes to send certain memories up to Headquarters (Triple Dent Gum

However, here's the pressing question.
Can memories in the Memory Dump be recovered even after they have faded away? I mainly ask based on when Bing Bong faded away, is it possible for him to return by, say, Riley finding an old drawing she may have made of him (assuming she must have taken her stuff from home in Minnesota) and Bing Bong possibly regenerates in her mind.
And... that's all for my attempt at an Inside Out discussion thread right now. Really wanting to do more sometime soon in the future.
