Broad permissions for software
The licence covers software and associated documentation and permits use, copying, modification, merging, publication, distribution, sublicensing and sale. Commercial exploitation is within its express permissions.
These are permissions under conditions rather than an automatic transfer of all copyright. Identifying an MIT notice on one component also differs from determining the status of every part of a combined project.
References: [1]
Preserving copyright and permission notices
All copies or substantial portions must include the copyright and permission notices. Broad permissions therefore do not mean absence of conditions or a right to erase the required notices.
The text does not require publication of every modification or public release of an entire project’s source. That absence of a publication condition must still be read alongside the notice obligation.
References: [1]
Permission differs from warranties
The software is supplied as is, with disclaimers concerning warranties including merchantability, fitness and noninfringement, and a limitation of liability. Access to code does not certify that it is safe or correct for every purpose.
Availability can support inspection and improvement, while quality remains a separate question. Identifying the actual MIT terms is more precise than treating the abbreviation as a general certification of provenance, authorship or reliability.
References: [1]