Question

what were the ideas that behrman found foolish?​

Answer 1

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Behrman was a sixty-year-old painter living on the ground floor. Sue poured out her worries about Johnsy to the old painter. She told that Johnsy was convinced that she would die when the last leaf fell. Behrman called Johnsy 'stupíd and foolish' as her mind was obsessed with superstition.

Answer 2

The ideas that Behrman found foolish was Joanna's words that she would die when the last leaf will fall.