Papers must be formatted in AAAI two-column, camera-ready style; see the 2019 author kit for details (link available July 2017). Papers must be in trouble-free, high-resolution PDF format, formatted for US Letter (8.5″ x 11″) paper, using Type 1 or TrueType fonts. AAAI submissions are anonymous, and must conform to the instructions (detailed below) for double-blind review. Submissions may have up to 8 pages with page 8 containing nothing but references. For final papers, authors may purchase up to two additional pages in the proceedings (see below for details). The last page of final papers may contain text other than references, but all references in the submitted paper should appear in the final version, unless superseded. The AAAI copyright block is not required on submissions, but must be included on final versions.