premise: Homebrew is a free and open-source software package management system that simplifies the installation of software on Apple's macOS operating system. Originally written by Max Howell, the package manager has gained popularity in the Ruby on Rails community and earned praise for its extensibility. Homebrew has been recommended for its ease of use as well as its integration into the command line.
hypothesis: Homebrew costs nothing.
reason: It says it is free. That means it costs nothing.