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Of course it is not by argument that we originally come by our belief in an independent external world. We find this belief ready in ourselves as soon as we begin to reflect: it is what may be called an instinctive belief. We should never have been led to question this belief but for the fact that, at any rate in the case of sight, it seems as if the sense-datum itself were instinctively believed to be the independent object, whereas argument shows that the object cannot be identical with the sense-datum.

[Problems of Philosophy, Bertrand Russell, Chapter II]

Does "should never have been led to" have the same meaning as "would never have been led to"?

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Yes.