Armstrong, who generally shunned the spotlight, went out of his way to clarify this scientific and historical point for Krulwich and his audience.

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The larger point of this exercise was to clarify and examine each individual argument against the practice.

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This degree of uncertainty is completely unsatisfactory, as the government has already agreed that Silk should unlock access to the borrowing powers which Welsh Labour feels are essential to enable the Welsh Government to invest in economic growth, and the Welsh secretary must now clarify the government's commitment on this point.

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