run-on:
two or more independent clauses incorrectly joined, usually by a comma. This term is often referred to as a comma splice. Examples are as follows:
The chamber leaked the radiation, the surrounding area was contaminated.
The chamber leaked the radiation, however, no one was seriously affected.
The chamber contained all the radiation, therefore, no one was injured.
Possible corrections to these run-ons would be as follows (boldface terms indicate changes):
The chamber leaked the radiation, and the surrounding area was contaminated.
Although the chamber leaked the radiation, no one was seriously affected.
The chamber contained all the radiation. Therefore, no one was injured.
slippery slope:
logical fallacy in which the writer makes the assumption that if one thing is allowed, it will be the first step in a downward spiral.