Assumption is information unstated that, when added to the premises, proves the conclusion.

The assumption underlying a conditional statement is that the necessary condition must occur in order for the sufficient condition to occur. The assumption in these arguments always protects the necessary condition.

Premise indicators:
because
since
for
for example
for the reason that
in that
given that
as indicated by
due to
owing to
this can be seen from
we know this by
Furthermore
Moreover
Besides
In addition
What's more

I think of it like Evidence (stated facts) + Assumptions (unstated facts) = Conclusion.

The assumptions are what need to be true in order for the given evidence to logically lead to the stated conclusion.

I am opening this again because the replies above don't satisfy me. Can someone please elaborate the difference between a premise and an assumption?

Is it correct to say that a premise can be (but not necessarily has to be) an assumption made?

For instance, in:
"Since all men are mortal and Socrates is a man, Socrates is mortal."

The premises for the conclusion that Socrates is mortal is that "all men are mortal" and "Socrates is a man". While both are premises, the first premise, "all men are mortal" is an assumption.

In sum, a premise is a claim that is a reason for, or an objection against, a conclusion in an argument. A might be an assumption or be based on an assumption, but could as well be a fact or be based on a fact.


Please also clarify what a stimulus is in the context of an argument or passage to read.

I also have a problem understanding the difference between the two. Is there anyone who could explain?

Thanks in advance

"All men are mortal, therefore Socrates is mortal"

Premise: All men are mortal
Assertion: Socrates is mortal

Assumption: Socrates is a man (unstated condition)