"It is assumed that it is possible that this mechanism [...]"
It looks a bit clumsy in my eyes, this that-that thing. May I write, then,
"It is assumed to be possible that this mechanism [...]"
Does the two sentences carry the same meaning?
(BTW, the mechanism-clause is very long, if it at all matters.)
Yes. You can even say "It is assumed possible that..."
[not a teacher]