|| The first character in a file 
    assigns a spacer glyph.
|| A program is made of rules and facts.

|| Two spacers indicate the creation of facts
|| Facts are separated by commas, 
    a matchbox, a log, paper

| A rule has a left side | And a right side.
| Facts on the left side | 
    are replaced by facts in the right side

| a flame, a log | a warm fire
| a matchbox | a match, a match, a box
| a match, paper | a flame

|| The first character in a file assigns a spacer glyph.
|| A program is made of rules and facts.

|| Two spacers indicate the creation of facts
|| Facts are separated by commas, a matchbox, a log, paper

| A rule has a left side | And a right side.
| Facts on the left side | are replaced by facts in the right side

| a flame, a log | a warm fire
| a matchbox | a match, a match, a box
| a match, paper | a flame