The Tyger A Poem by William Blake www.poetryfoundation.org Tyger Tyger burning bright, In the forests of the night: What immortal hand or eye, Dare frame thy fearful symmetry? It's a Magical World
Changing constraints The Constraints Keep Changing The explicit listing of known constraints in the design program helps here. The designer can periodically scan the list, asking, “Can this constraint now be removed because the world has changed? Can it be entirely circumvented by working outside the design space?” Frederick P. Brooks, Jr., What's Wrong With This Model? What's wrong with the rational model constraints