Where the Sprinklers Decide Who Sits With the Pigeons: A Regression-Discontinuity Estimate of the Courtyard Irrigation Timer's Effect on Coffee-Queue Seating and Tea-Room Biscuit-Rationing Hours Resolving to Where the Sprinklers Decide Who Sits With the Pigeons: A Regression-Discontinuity Estimate of the Courtyard Irrigation Timer's Effect on Coffee-Queue Seating and Tea-Room Biscuit-Rationing Hours…