“By producing at an output rate at which marginal revenue equals marginal cost, a firm is definitely making positive economic profits.” Do you agree or disagree? Why?

When it produces at an output rate at which marginal revenue equals marginal cost, the firm is doing its best (providing price exceeds its average variable cost). However, the firm does not necessarily make a profit. Depending on the market conditions that affect the market price and its average variable cost, it may actually incur a loss but the loss is still the minimum as long as marginal revenue equals marginal cost.