Communication

Humans or any biological beings share thoughts with others. For this, communication is very essential. 

We need some language or medium to communicate the thought/feeling. More precisely said, from the inside of our brain to brain of other person. So we tend to convert our thoughts into code/language and release it..which is received by someone..and it is READ and interpreted..according to whatever capability the other person has to reach nearest possible conclusion regarding what the person A wanted to communicate in the first place.

Another challenge that will have to be resolved is that one brain has a different level of capability than the one it needs to communicate to or the one from which communication is received. So a thought/message is mix up of sensations, feelings, logic, reason, pretext, and assumptions etc which also needs to be shared along with the core message...the problem becomes trifold.

Language/method of communication may not be good enough..i.e it would be in our best of interests that the mode of communication is such that what I wanna convey, its exactly conveyed...rather than losing the meaning while grappling with nuances of the language which is JUST a tool.

Secondly, One brain manufacturing/packaging a thought may do it in a certain manner which other brain might not be able to decipher or in simple words...completely get the point...

And finally, the problem of transferring supporting information into the package...

So brain to brain exchange is not possible even today..the transfer of the train of thoughts from one complex machine..to another complex machine is a problem worth solving.