| | |
.---------------.

In the N.W. Quarter, only _one_ of the two Cells is marked as
_empty_: so we do not know whether the N.W. Quarter of the
Biliteral Diagram is _occupied_ or _empty_: so we cannot mark
it.

.-------.
| |(O)|
|---|---|
| | |
.-------.

In the N.E. Quarter, we find _two_ "O"s: so _this_ Quarter is
certainly _empty_; and we mark it so on the Biliteral Diagram.

In the S.W. Quarter, we have no information _at all_.

In the S.E. Quarter, we have not enough to use.

We may read off the result as "No x are y'", or "No y' are x,"
whichever we prefer.

(2)
.---------------.
| | |
| .---|---. |
| |(O)|(I)| |
|---|---|---|---|
| |(O)| | |
| .---|---. |
| | |
.---------------.

In the N.W. Quarter, we have not enough information to use.

In the N.E. Quarter, we find a "I". This shows us that it is
_occupied_: so we may mark the N.E. Quarter on the Biliteral
Diagram with a "I".

.-------.
| |(I)|
|---|---|
| | |
.-------.

In the S.W. Quarter, we have not enough information to use.

In the S.E. Quarter, we have none at all.

We may read off the result as "Some x are y'", or "Some y' are
x", whichever we prefer.
pg055
(3)
.---------------.
| | |
| .---|---. |
| | |(O)| |
|---|(I)|---|---|
| | |(O)| |
| .---|---. |
|(O) | (O)|
.---------------.

In the N.W. Quarter, we have _no_ information. (The "I", sitting
on the fence, is of no use to us until we know on _which_ side
he means to jump down!)

In the N.E. Quarter, we have not enough information to use.

Neither have we in the S.W. Quarter.

.-------.
| | |
|---|---|
| |(O)|
.-------.

The S.E. Quarter is the only one that yields enough information
to use. It is certainly _empty_: so we mark it as such on the
Biliteral Diagram.

We may read off the results as "No x' are y'", or "No y' are
x'", whichever we prefer.