BPP: ###

About 80% of the life of BPP is spent processing code with no # symbols.

# Of the remaining 20%, about 80% of that is spent with the first-level preprocessor.

## Of the remaining 20%, all the useful preprocessor code we have written or seen has used only the second level processor.

### If, in writing a practical application, you find that ###-level preprocessor steps help, I would love to hear about it. Then I'll change this to the ####-page...