"entertain the concept" is a grammatically correct sentence in written English.
You can use it to suggest that someone should consider a new idea or thought. For example, "If you want to truly understand this strategy, you need to entertain the concept of using technology to get the job done."
The Premier League refuses even to entertain the concept.
Another possibility is what is referred to as priming: believing the putter was once used by a professional could have led the participants to entertain the concept of "skill".
Young children and people from other cultures do not consciously entertain the concept of God and have not done so.
Second, sentences like "If something is human, it is an animal" are false if taken to be about understandings, for someone could entertain the concept human without entertaining the concept animal, and so the antecedent would obtain without the consequent.
Indeed, more strongly, we must be able to entertain the concept of a smallest really existent Martian and to recognise that the property of "really existing" is part of this concept while nonetheless maintaining that there are no smallest existent Martians.
For every person who has no trouble admitting that they have regrets in life, there is at least one other individual who doesn't even care to entertain the concept.
When the Fool entertains the concept of that than which no greater can be conceived he recognises that he is entertaining this concept (i.e., he believes that he is entertaining the concept of that than which no greater can be conceived or, as we might say, that the concept is in his understanding).
But since Wittgenstein was later to accuse his Tractarian self of having entertained the concept of a distinctive kind of philosophical discovery (see WVC 182, quoted below), we must not rush — as Malcolm appears to have done, to the conclusion that he conceived of the discovery in question as "empirical" in anything like the contemporary sense of the word.
I know some of you will swear they did it in 12 hours, but I won't entertain here the concept of speeding on interstates, or on local highways, something I never find fun to do.
Here is a modest attempt to provide such an analysis: We start with the claim that the Fool understands the expression "being than which no greater can be conceived", i.e., even the Fool can entertain the idea or possess the concept of a being than which no greater can be conceived.
In other words, we must be able to have the concept of, or entertain the idea of, a smallest really existing Martian without believing that there really are any smallest Martians.
