A Supplementary Material: Learning Compositional Rules via Neural Program Synthesis A.1 Experimental and computational details

All models were implemented in PyTorch. For all experiments, we report standard error below. Primitive rules map a word to a color (e.g. In a higher-order rule, the left hand side can be one or two variables and a word, and the right hand side can be any sequence of bracketed forms of those variables. Figure A.2 shows several example training grammars sampled from the meta-grammar.