Assume vs presume

[nq:1]They are similar in meaning. In what context are they non-interchangable? Same with the adverb assumably and presumably.[/nq]
Presume can sometimes mean to go too far in acting unwarrantably or in taking liberties:
"How dare you presume to address me in that manner sir!"

Assume can sometimes mean to take over the duties or responsibilities of some office:
"He then assume

[nq:1]They are similar in meaning. In what context are they non-interchangable?[/nq]
"To search (for something)" means "to look for something". "To research something" means to follow a programme of study and/or experiment in order to gain new knowledge.
[nq:1]Same with the adverb assumably and presumably.[/nq]
I've never heard of an adverb "assumably". John Ings has outlined the diffe

I found this...
assumably
\***"***\, adv. By way of assumption.
Source: Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.

Assumably, it might clear things up.

[nq:1]I found this... assumably \***"***\, adv. By way of assumption. Source: Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc. Assumably, it might clear things up.