Exactly! He doesn't say that he "lacks belief" in an afterlife. He positively declares that there is no afterlife.
Yes, but not because I
believe it. The afterlife is
defined as 'life after death'. But death is defined as 'the end of life'. Therefore the afterlife is syntactically impossible. An afterlife with supernatural elements is even more impossible, since the supernatural does not exist
by definition.
The definition of belief is:-
acceptance of, or confidence in, an alleged fact or body of facts as true or right without positive knowledge or proof.
I have
proof that the afterlife doesn't exist, because it is
defined as not existing. Therefore my statement that 'there is no afterlife' is simply stating this
fact. That is no different from stating that (in the natural number system) 2 + 2 <> 5.
If "lack of belief" is synonymous with "disbelief" then why do so many posters here make so much noise about the distinction?
Anybody who says they are the same is wrong, Disbelief is defined as:-
inability or refusal to accept that something is true or real.
However I don't know what you mean by 'many posters here'. In this thread the only person who has used the word 'disbelief' is
you.
Again, Roger doesn't claim a "lack of belief" in an afterlife. He positively declares that there is NO afterlife. You claim that there is no difference between the two positions (the only way that you can fault my post) but that makes you a minority of one.
There is a subtle difference between them that is often not distinguished. Simple unbelief is due to lack of credibility, positive unbelief is a result of knowledge. But many people will say they 'don't believe' something when what they really mean is that they
know it isn't true. Similarly they may say that they 'believe' something when they actually have knowledge or proof of it.
Outside of the dictionary, words are defined by popular usage. It's not unusual for words to be used interchangeably when by strict definition they shouldn't. Furthermore dictionaries often provide several
different meanings that have to be determined by context.
We all know what you are trying to do. By parsing words narrowly you are attempting to equate 'unbelief' or 'disbelief' with 'belief'. It won't work though. When someone has
knowledge or proof that something isn't true, it's not a matter of belief (same as when they know it
is true).