Refactor intersection tree to eliminate redundant validity checks in recursive methods#10

gjbex merged 2 commits intodevelopmentgjbex/Python-for-programmers:developmentfrom

copilot/fix-53eb5a18-6371-4fef-ab3b-e7fd003f7cfcgjbex/Python-for-programmers:copilot/fix-53eb5a18-6371-4fef-ab3b-e7fd003f7cfcCopy head branch name to clipboard