What if it were the case that justification of our beliefs in propositions describing physical objects is always inferential and that it is always from propositions about the nature of our experiences that such inferences are made.? If this is true, there are two conditions that must be satisfied concerning inferential belief in physical objects:

(1) Statements about experience must count as reasons or evidence for statements about objects.
(2) Statements about experience must in some, no doubt rather obscure, sense be accepted by those who make statements about objects.

Maybe there’s reason to doubt  (1) and (2) by simply suggesting that that it is not always the case that most people are always in the “appropriate, sophisticated, phenomenological frame of mind.”  This is certainly true to an extent; so let us refer to this handicap as H.  It may be the case person S is intoxicated with alcohol and his phenomenological apprehension may be malfunctioning or that S realizes that his phenomenological apprehension of the external world is not as it should be and is capable of recognizing malfunction.